HP StorageWorks
XP24000/XP20000 Snapshot User Guide
Abstract
This guide explains how to use HP StorageWorks XP Snapshot Software to create space-efficient point-in-time copies of data
volumes on an HP StorageWorks XP24000/XP20000 storage system. Topics include creating, monitoring, and troubleshooting
snapshot pools, virtual volumes, and copy pairs. The intended audience is a storage system administrator or authorized service
provider with independent knowledge of HP StorageWorks XP storage systems and Remote Web Console.
HP Part Number: T5213-96033
Published: May 2011
Edition: Twelfth
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Contents
Contents
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7 Support and other resources....................................................................116
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1 Overview of HP StorageWorks XP Snapshot Software
This chapter provides an overview of XP Snapshot and describes the features and benefits of XP
Snapshot.
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Unless otherwise specified, the term storage system in this guide refers to the following disk arrays:
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HP StorageWorks XP24000 Disk Array
HP StorageWorks XP20000 Disk Array
The GUI illustrations in this guide were created using a Windows computer with the Internet Explorer
browser. Actual windows may differ depending on the operating system and browser used. GUI
contents also vary with licensed program products, storage system models, and firmware versions.
XP Snapshot
The XP Snapshot feature of the HP storage system rapidly creates logical point-in-time snapshot
copies of data volumes within the storage system, or behind the storage system as external storage,
without impacting host service or performance levels. XP Snapshot accelerates backup and recovery
processes by reducing the amount of disk storage required for the snapshot copies. Because only
the changed data blocks are stored in the XP Snapshot storage pool, the snapshot copy is
substantially smaller than the source, saving a significant amount of storage capacity over full
cloning methods. XP Snapshot’s capability for quick restoration of data reduces traditional,
tape-based application restore time from hours to seconds.
Features
The key features of XP Snapshot are:
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Point-in-time copies of only changed blocks in the XP Snapshot data pool, not full volume.
Instantaneous restore of just the data you need.
Versioning of backups for easy restore.
RAID protection of all XP Snapshot copies.
Near-instant copy creation and deletion.
Easy integration with industry-leading backup software applications.
Benefits
XP Snapshot provides the following business benefits:
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Reduces recovery time from data corruption or human error considerably via an immediate
restore from a disk-resident, point-in-time data snapshot copy.
Allows frequent data backup operations to be performed nondisruptively, while critical
applications run unaffected.
Accelerates application testing and deployment by providing always-available copies of
current production information.
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Enables immediate access to time-critical information.
Eliminates the backup window.
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Improves operational efficiency by allowing multiple processes to run in parallel with access
to the same information.
Allows disk space to be used efficiently through volume snapshots rather than full-copy clones,
which helps maximize disk space.
Differentiation from HP StorageWorks XP Business Copy Software
XP Business Copy differs from XP Snapshot in that it creates physically separate copies of the data;
key differences between the XP Snapshot and XP Business Copy products.
Table 1 XP Snapshot and XP Business Copy Differentiators
XP Snapshot Virtual Volume
XP Business Copy Clone
Features
Provides a very quick copy because
it is a virtual volume
Superior protection because it is a
complete copy
Immediate restore if P-VOL becomes
corrupted
Time to Create
Instantaneous
From minutes to hours, depending on
the size of the P-VOL
Disk Space Used
Size will vary depending upon the
amount of data changed
Same amount as P-VOL
Data Recovery Time After P-VOL is
corrupted
Two-stage restore:
Instantaneous
1. V-VOL verify, data not available to
host
2. Copy back from a tape storage or
other, data available
Size of Physical Volume
P-VOL = S-VOL
P-VOL
Pool for one V-VOL
Pair Configuration
Restore
P-VOL : V-VOL = 1 : 64
P-VOL : S-VOL = 1 : 3
P-VOL can be restored from any V-VOL P-VOL can be restored from S-VOL
Figure 1 Product Differentiators for XP Snapshot and XP Business Copy Software
Differentiation from HP StorageWorks XP Business Copy Software
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2 About XP Snapshot Operations
This chapter describes the volumes used by XP Snapshot and the functions of XP Snapshot.
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XP Snapshot Components
A system using XP Snapshot usually contains the following components.
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Pair of volumes (P-VOL and S-VOL)
Consistency group
XP Snapshot program product
Licensed XP Business Copy program product
XP RAID Manager
Volumes and Volume Pairs
XP Snapshot copies the original data in a P-VOL to a V-VOL. A V-VOL is specified as an S-VOL
and manages a P-VOL. A P-VOL is the logical volume and an S-VOL, which is the V-VOL, is the
volume for an XP Snapshot pair.
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A virtual volume of XP Thin Provisioning Software can be specified as a logical volume, but
a virtual volume of XP Snapshot should not be specified.
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The differential data between the P-VOL and the S-VOL will be stored in a pool volume as
snapshot data. Therefore, you need at least one logical volume as a copy source (P-VOL), one
V-VOL as a copy target (S-VOL), and one pool-VOL where you can store snapshot data.
Volume Pairs and Consistency Group
You can define plural XP Snapshot pairs as one consistency group by using RAID Manager. When
you store snapshot data by consistency group, data is copied as of the same point in time for all
P-VOLs in the group.
XP Snapshot Software
You can operate XP Snapshot by using the XP Remote Web Console computer. The Remote Web
Console computer is connected to the storage systems via the TCP/IP local-area network (LAN).
The Remote Web Console computer communicates and exchanges data directly with the service
processor (SVP) of the connected systems. You can then acquire the information about the
configuration or status of the system, or issue commands to the system.
License
You need to install the XP Business Copy license in the Remote Web Console computer before you
operate XP Snapshot. In addition, to create XP Snapshot pairs, you must purchase the XP Business
Copy license and ensure that there is enough licensed capacity for the pairs you are going to
create.
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XP Business Copy license capacity includes:
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XP Snapshot P-VOLs
XP Snapshot pool-VOLs
XP Business Copy P-VOLs
XP Business Copy S-VOLs
XP Business Copy reserved volumes
These volumes are called used volumes. When determining how much license capacity to purchase,
ensure that there will be enough licensed capacity for these used volumes. You must limit the total
capacity of the used volumes so that it will be equal to or less than the licensed capacity.
RAID Manager
Part of XP Snapshot operations require RAID Manager. When you use RAID Manager, you do not
need to use the Remote Web Console computer. Instead, you operate XP Snapshot directly from
the host by executing the commands.
XP Snapshot Operations
XP Snapshot enables you to maintain and copy data on the HP storage system. XP Snapshot is
used for data for open systems such as UNIX and PC servers. “How Data is Copied Using XP
Snapshot” (page 9) illustrates how data is copied in the XP24000/20000 Disk Array storage
system using XP Snapshot.
Figure 2 How Data is Copied Using XP Snapshot
XP Snapshot Operations
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the host requests an update of Data A to Data B, XP Snapshot will copy Data A to the pool volume
in the pool before the P-VOL is updated. After the copy operation of Data A has completed, Data
B will be written to the part where Data A was stored in P-VOL, and the P-VOL will be updated.
From the V-VOL, you can access Data B in the P-VOL and Data A in the pool-VOL.
Create V-VOL Management Area Operation
A V-VOL management area needs to be created in the shared memory before you use XP Snapshot.
The V-VOL management area is an important area for associating an S-VOL (a V-VOL) of XP
Snapshot with a pool-VOL. The V-VOL management area is created automatically when the
additional shared memory is installed. Call HP technical support for the installation of additional
shared memory.
There are two kinds of areas in the V-VOL management area: pool management block and pool
association information. When you create pools or XP Snapshot pairs, the pool management block
or pool association information will be stored in the V-VOL management area; therefore, the
available capacity of the V-VOL management area decreases. When all capacity of the V-VOL
management area is used, the capacity ratio of the pool management block and the pool association
information in the V-VOL management area will be fixed. If the capacity of the pool management
block is insufficient, problems may occur; for example, you cannot create new pools or create
pools with a large amount of capacity. To solve such problems, you need to optimize the V-VOL
management area.
Creation of a Pool
An XP Snapshot pool is an area to store snapshot data. A pool consists of multiple pool-VOLs, and
snapshot data is stored in a pool-VOL. 1024 pool-VOLs can be registered in a pool, and 128
an XP Snapshot pair and a pool.
Figure 3 The Relationship Between an XP Snapshot Pair and a Pool
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You need to create a pool when you use XP Snapshot. Pool-VOLs registered in a pool can be
added but cannot be deleted. In addition, all snapshot data in the pool must be deleted to delete
the pool itself.
WARNING! The capacity of a pool is equal to the total capacity of the pool-VOLs registered in
the pool. The status of the XP Snapshot pair will be PSUE (status when failure occurred) when the
usage rate of the pool exceeds the capacity of the pool as a result of writing data in the volume
of that pair. XP Snapshot data cannot be stored in the pool, and no new XP Snapshot pair can be
pool capacity.
To create a pool, use the Pool window of the Remote Web Console.
Creation of a Virtual Volume
A V-VOL is a virtual volume which does not have physical memory space. A V-VOL needs to be
created before you create an XP Snapshot pair, because you must use a V-VOL as the S-VOL of
an XP Snapshot pair.
The definition of a V-VOL cannot be released if the V-VOL is being used as the S-VOL of an XP
Snapshot pair. To release the definition, you must delete the XP Snapshot pair that uses the V-VOL.
CAUTION: If you are using HP-UX as a host server, remember the following when you execute
the command on V-VOLs in order to recognize the device from the host server:
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If the device is already recognized by the host server, do not change its volumes to V-VOLs.
Before executing the command to recognize the device, create XP Snapshot pairs and store
snapshot data.
If you do not follow these precautions, an error may occur and the host server may be terminated.
When the host server is terminated because of the command to recognize the device, retry the
command by completing the following steps:
1. Force the command process and its parent process to terminate.
2. Create an XP Snapshot pair.
3. Store the snapshot data in the pool.
4. Execute the command again to recognize the device.
Servers (including RAID Manager) will indicate the emulation type of the V-VOLs with a 0 (for
example, OPEN-0V). When you create an XP Snapshot pair, specify the volume whose emulation
type includes 0, such as OPEN-0V, as the S-VOL.
Before creating a V-VOL, you need to define a V-VOL group. Like the emulation type of V-VOLs,
the emulation type of a VDEV for a V-VOL group is OPEN-V. In addition, the capacity of the VDEV
is always 4 TB. Therefore, the maximum capacity of a V-VOL is also 4 TB.
XP Snapshot Operations
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Creation of an XP Snapshot Pair
An XP Snapshot pair uses a V-VOL as its S-VOL. Therefore, you need to create a V-VOL before
creating an XP Snapshot pair. In an XP Snapshot pair, up to 64 S-VOLs can be specified for a
P-VOL.
CAUTION: When you create an XP Snapshot pair, you decide which pool will be used by the
pair. If you create two or more XP Snapshot pairs that share the same P-VOL, you need to specify
the same pool for these pairs. For example, if you specify three S-VOLs for one P-VOL, you need
to specify the same pool for these three pairs.
When you delete an XP Snapshot pair, the status of the volumes becomes SMPL(PD). You cannot
create pairs by using SMPL(PD) volumes. If the volumes are in SMPL(PD) status, wait for a while
and issue the command to create pairs after the volume status changes to SMPL.
Use the XP Business Copy's Pair Operation window to see the status of the volume. Using RAID
Manager, you can check the volume status by the pairdisplaycommand, but you cannot
distinguish between an SMPL volume and an SMPL(PD) volume. To distinguish between an SMPL
volume and an SMPL(PD) volume by using RAID Manager, you need to issue the inqraidcommand
as well. The inqraidcommand will show you whether or not the volume is being used by XP
Snapshot. As a result of the inqraidcommand, if the volume is not used by XP Snapshot, the
volume status is SMPL. If the volume is used by XP Snapshot, the status of the volume is SMPL(PD).
NOTE: When using the inqraidcommand specify the -fwoption of the XP Snapshot pair IDs
from 3 to 63.
Storing XP Snapshot Data
XP Snapshot data is a replica of data in the P-VOL of an XP Snapshot pair, and is stored in a pool.
When the P-VOL is updated, the updated part of the data is copied to the pool as snapshot data
before the P-VOL is updated. This process is called storing snapshot data.
If you issue a command to an XP Snapshot pair to store snapshot data, the snapshot data will be
stored in the pool later, at the time a host makes a write request to the P-VOL of an XP Snapshot
pair. An XP Snapshot pair can store up to 64 snapshot data per a P-VOL.
To store snapshot data, you can use the RAID Manager command.
You can also store snapshot data for each consistency group by using RAID Manager. When you
store snapshot data by consistency group, data is copied as of the same point in time for all P-VOLs
group.
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Figure 4 Overview of Storing XP Snapshot Data by a Consistency Group
When an XP24000/XP20000 Disk Array accepts the command from RAID Manager, which
Snapshot pairs in the corresponding consistency group will change to PSUS (2 in Figure 4 (page
13)). After that, when the host issues write I/O request to each P-VOL in the corresponding
You can also use the RAID Manager commands to store snapshot data by a consistency group.
From XP Remote Web Console, you can only view the consistency groups.
XP Snapshot does not support Quick Split mode. Therefore, even if you specify Quick Split mode,
Quick Split mode does not take effect.
Restoration of an XP Snapshot Pair
XP Snapshot can restore the contents of the P-VOL to the state when the snapshot data was stored
in the pool by writing the snapshot data back to the P-VOL. Writing the snapshot data to the P-VOL
is called restoration of the XP Snapshot pair.
If you restore the pair when the data is written in the S-VOL, instead of the snapshot data, the data
in the S-VOL will be written back to the P-VOL.
If there are problems with the data of a P-VOL during a failure, you can restore the P-VOL to the
normal state when the snapshot data was stored by executing restoration.
Deletion of XP Snapshot Data or an XP Snapshot Pair
The status of the XP Snapshot pair will be PSUE (status when the failure occurred) when, as a result
of writing data in the volume of that pair, the capacity of snapshot data exceeds the capacity of
the pool specified when the pool was defined. An XP Snapshot pair cannot be created and snapshot
data cannot be stored in the pool. Therefore, unnecessary snapshot data needs to be deleted.
There are two ways to delete snapshot data:
XP Snapshot Operations
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Delete the XP Snapshot pair itself.
Delete only the snapshot data.
When an XP Snapshot pair is deleted, not only is the snapshot data stored in the pool deleted,
but also the relationship between the P-VOL and the S-VOL will be released. If only the snapshot
data is deleted, the relationship between the P-VOL and the S-VOL is maintained. When only the
snapshot data is deleted, the snapshot ID of the deleted snapshot data can be assigned to the
newly stored snapshot data of the XP Snapshot pair.
After the command is issued to delete snapshot data, no more snapshot data of that XP Snapshot
pair will be stored in the pool, even if the host tries to write data in the P-VOL. To store snapshot
data for that XP Snapshot pair again, you need to issue the command for storing snapshot data.
The required time for deleting snapshot data or XP Snapshot pairs is several seconds, and sometimes
more than ten minutes. The time will increase if the deleted pair uses a large amount of the pool,
or if multiple pairs are deleted at one time.
When you delete an XP Snapshot pair, the status of the volumes becomes SMPL(PD). Use the XP
Business Copy's Pair Operation window to see the status of the volume.
Using RAID Manager, you can check the volume status by the pairdisplaycommand, but you
cannot distinguish between an SMPL volume and an SMPL(PD) volume. To distinguish between an
SMPL volume and an SMPL(PD) volume by using RAID Manager, you need to issue the inqraid
command as well. The inqraidcommand will show you whether or not the volume is being used
by XP Snapshot. As a result of the inqraidcommand, if the volume is not used by XP Snapshot,
the volume status is SMPL. If the volume is used by XP Snapshot, the status of the volume is SMPL(PD).
NOTE: When using the inqraidcommand, specify the -fwoption of the XP Snapshot pair IDs
from 3 to 63.
Status of the XP Snapshot Pairs
When you create or split an XP Snapshot pair, the status of the pair changes. “XP Snapshot Pair
Status Transition” (page 15) shows the transition of the status of an XP Snapshot pair.
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Figure 5 XP Snapshot Pair Status Transition
1. If a volume is not assigned to an XP Snapshot pair, its status is SMPL.
2. Issue the paircreatecommand on the SMPL volume to create an XP Snapshot pair. When
you create the first pair for the P-VOL, the pair status changes to COPY, and then the pair
status changes to PAIR when the operation completes. If you specify a volume which is already
paired with one or more S-VOLs as the P-VOL to create another pair, the pair status will not
change to COPY. The pair status will change to PAIR when the operation completes.
3. Issue the pairsplitcommand on the XP Snapshot pair in PAIR status to store the snapshot
data in the pool. When the operation completes, the pair status changes to PSUS.
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If you execute the paircreatecommand immediately after deleting the last snapshot
data of the P-VOL, it may take time to create a new pair.
If the pool capacity exceeds the threshold when an XP Snapshot pair is in PAIR status,
the pair status changes to PFUL in RAID Manager. For details, see the HP StorageWorks
XP RAID Manager User Guide.
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If the pool capacity exceeds the threshold when an XP Snapshot pair is in PSUS status,
the pair status changes to PFUS in RAID Manager. For details, see the HP StorageWorks
XP RAID Manager User Guide.
4. To delete only snapshot data and leave the XP Snapshot pair, issue the pairresynccommand
to the PSUS or PFUS pair. During the operation, the pair status changes to COPY(RS).
To delete the XP Snapshot pair, issue the pairsplit-Scommand or use Remote Web
Console. During the operation, the pair status changes to SMPL(PD).
5. Issue the pairresync -restorecommand on the XP Snapshot pair in PSUS status to restore
the pair. After that, the snapshot data will be written back to the P-VOL. During the operation,
Status of the XP Snapshot Pairs
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the pair status changes to COPY(RS-R). When the operation completes, the pair status changes
to PAIR.
6. A pool can contain only a predefined amount of data. If the total capacity of the snapshot
data in the pool exceeds the pool capacity, the pair status changes to PSUE. The pair status
also changes to PSUE when a failure occurs while restoring the pair or when the usage rate
of the pool reaches 100 percent. The pair status may change to PSUE when the failure occurs
during a process other than restoring.
Whether the host can read and write the P-VOL or S-VOL of an XP Snapshot pair depends on the
availability of the host access.
Table 2 Whether Hosts Can Access P-VOL and S-VOL
Pair Status
P-VOL
Read
Yes
S-VOL
Read
—
Write
Yes
Write
—
SMPL
COPY
Yes
Yes
No
No
No
Yes
No
No
No
No
PAIR/PFUL
PSUS/PFUS
SMPL(PD)
COPY(RS)
COPY(RS-R)
PSUE
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes*
Yes*
No
Yes: Host can access the volume.
No: Host cannot access the volume.
*: If the pair status changes to PSUE because of a failure during restoration, the host cannot access
that pair.
CAUTION: If the host computer uses application software to monitor the volumes of the XP
Snapshot pairs, problems such as an abnormal end may occur. For example, because the S-VOL
whose status is not PSUS (or PFUS) rejects the access from the host, problems may occur on the
monitoring application software whose access is rejected. In addition, if the host computer connects
to more than one port, problems may also occur on the ports that are not connected to the S-VOL
that rejected the host access. You need to terminate the application software which monitors the
volumes in order to solve these problems.
Use RAID Manager commands to operate XP Snapshot pairs. However, whether or not the
pair statuses and the results of the RAID Manager commands.
Table 3 Pair Statuses and the Results of the RAID Manager Commands
Pair Status RAID Manager Command
paircreate
paircreate
−split
pairsplit
pairresync
pairresync
-restore
pairsplit -S pairsplit -E
SMPL
Yes
No
No
Yes
No
No
Yes
No
No
NOP
No
No
No
No
COPY
NOP
NOP
NOP
NOP
NOP
PAIR / PFUL NOP
Yes
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Table 3 Pair Statuses and the Results of the RAID Manager Commands (continued)
Pair Status RAID Manager Command
paircreate
paircreate
−split
pairsplit
pairresync
pairresync
-restore
pairsplit -S pairsplit -E
PSUS /
PFUS
No
NOP
NOP
Yes
Yes
Yes
No
SMPL(PD)
COPY(RS)
No
No
No
No
No
No
No
No
No
No
No
NOP
No
No
NOP
NOP
NOP
Yes*
NOP
NOP
No
No
COPY(RS-R) NOP
PSUE No
No
No
Yes
NOP
Yes: The command executes the process and ends normally.
NOP: The command does not execute the process, but ends normally.
No: The command ends abnormally (that is, command rejected).
* If you issue the pairresynccommand to the pair whose status has changed to PSUE because
of the shortage of the shared memory for the V-VOL management area, the command will be
rejected and end abnormally.
When the command executes the process and ends normally, the pair status changes according
to the process. For information about how the pair status changes when the command ends normally,
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The hide mode (-m noread) on the S-VOL is not supported. If you specify the hide mode on
the S-VOL and create a pair, the command will end normally, but the hide mode will be
ignored.
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When the RAID Manager command ends abnormally (for example, when the RAID Manager
command is rejected), and if the OS of the host computer is HP-UX, SSB (sense byte), which
indicates the cause of the error, will be generated in the RAID Manager error log file. For
more information about the SSBs and the cause of the errors, see “Troubleshooting When
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands
SSB
RAID Manager Command
Cause of Error
B901
B9A8
B9A9
B9AD
paircreate, pairresync, pairsplit
An error has occurred during the XP
Snapshot pair operation. For the cause,
check the SSB being output together.
9685
9686
9700
paircreate
paircreate
paircreate
Because there are no pair tables
available, the XP Snapshot pair cannot
be created.
Because of the shortage of the
differential tables, XP Snapshot pair
cannot be created.
Because the pool is not available, the
XP Snapshot pair cannot be created.
Status of the XP Snapshot Pairs
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Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)
SSB
RAID Manager Command
paircreate
Cause of Error
9702
When attempting to create multiple XP
Snapshot pairs by specifying multiple
S-VOLs for one P-VOL, you specified a
pool ID that was different from the one
being used by existing pairs. As a
result, new XP Snapshot pairs cannot
be created.
9703
9704
9705
paircreate
paircreate
paircreate
Because the volume you specified as
the P-VOL is being used by the other XP
Snapshot S-VOL, the pair cannot be
created.
Because the volume you specified as
the S-VOL is being used by the other XP
Snapshot P-VOL, the pair cannot be
created.
Because the volume you specified as
the S-VOL is being used by the other XP
Snapshot S-VOL, the pair cannot be
created.
9706
9707
9718
paircreate
Because the specified snapshot ID is
being used by the other XP Snapshot
pair, the new pair cannot be created.
paircreate
Because the capacity of the pair
exceeds the licensed capacity, the pair
cannot be created.
All commands
The command ended abnormally
because a command other than the
paircreate command was issued for the
volume in the pair other than XP
Snapshot pair.
This error also may be reported when
the command is executed with
specifying an unsupported parameter.
9719
All commands
The command ended abnormally
because the pair is in the status that the
corresponding command is not
accepted at present.
This error also may be reported when
the command is executed with
specifying an unsupported parameter.
971a
971b
971f
paircreate
Because the capacity of shared memory
is insufficient, the pair cannot be
created.
paircreate
Because the capacity of shared memory
is insufficient, the pair cannot be
created.
pairresync -restore
Because the volume you specified as
the P-VOL has an S-VOL Disable
attribute, XP Snapshot pair cannot be
restored.
9720
All commands
Any errors have occurred because of
the XP Snapshot operation.
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Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)
SSB
RAID Manager Command
Cause of Error
9721
9723
9724
9725
paircreate pairsplit pairresync
pairresync -restore
Because either XP Snapshot or XP
Business Copy is not installed, the
command ends abnormally.
All commands
All commands
All commands
Because no additional shared memory
(FCV2, TPF, Extension is available, the
command ends abnormally.
Because no additional shared memory
(more than XP Snapshot) is available,
the command ends abnormally.
Because the LDEV number of the volume
you specified as the P-VOL is beyond
the specified range, the command ends
abnormally.
9726
9727
9728
All commands
Because you specified the unmounted
volume as the XP Snapshot P-VOL, the
command ends abnormally.
paircreate, pairsplit, pairresync,
pairresync -restore
Because you specified the blocked
volume as the XP Snapshot P-VOL, the
command ends abnormally.
paircreate, pairsplit, pairresync,
pairresync -restore
Because you specified the volume that
is in process of formatting as the XP
Snapshot P-VOL, the command ends
abnormally.
9729
972a
972c
972e
paircreate, pairsplit, pairresync,
pairresync -restore
Because you specified the volume
whose emulation type is other than
OPEN-V as the XP Snapshot P-VOL, the
command ends abnormally.
paircreate
paircreate
paircreate
Because the volume you specified as
the XP Snapshot P-VOL has the
command device setting, the pair
cannot be created.
Because the capacity of the volume you
specified as the XP Snapshot P-VOL
exceeds the supported size (4 TB), the
pair cannot be created.
Because the capacity of the volume you
specified as the XP Snapshot S-VOL
exceeds the supported size (4 TB), the
pair cannot be created.
972f
9730
9731
paircreate
Because you specified a V-VOL as the
XP Snapshot P-VOL, the pair cannot be
created.
paircreate
Because you specified a pool-VOL as
the XP Snapshot P-VOL, the pair cannot
be created.
pairresync -restore
When the XP Snapshot P-VOL and XP
Continuous Access P-VOL share the
volume, the status of the XP Continuous
Access pair is other than PSUS or PSUE.
Therefore, the XP Snapshot pair cannot
be restored.
Status of the XP Snapshot Pairs
19
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Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)
SSB
RAID Manager Command
pairresync -restore
Cause of Error
9732
When the XP Snapshot P-VOL and XP
Continuous Access Journal P-VOL share
the volume, the status of the XP
Continuous Access Journal pair is other
than PSUS or PSUE. Therefore, the XP
Snapshot pair cannot be restored.
9733
9734
9735
9736
pairresync -restore
pairresync -restore
paircreate
Because the XP Snapshot P-VOL and XP
Continuous Access S-VOL share the
volume, the XP Snapshot pair cannot
be restored.
Because the XP Snapshot P-VOL and XP
Continuous Access Journal S-VOL share
the volume, the XP Snapshot pair
cannot be restored.
Because you specified an XP
Continuous Access Journal’s journal
volume as the XP Snapshot P-VOL, the
XP Snapshot pair cannot be created.
paircreate, pairsplit, pairresync,
pairresync -restore
Because the LUSE volumes you specified
for the P-VOL and S-VOL do not have
the same structure, the command ends
abnormally.
973a
973b
paircreate
Because you specified the volume with
the VMA setting as the XP Snapshot
P-VOL, the pair cannot be created.
All commands
Because the LDEV number of the volume
you specified as the S-VOL is beyond
the specified range, the command ends
abnormally.
973c
973d
973e
All commands
Because you specified the unmounted
volume as the XP Snapshot S-VOL, the
command ends abnormally.
paircreate, pairsplit, pairresync,
pairresync -restore
Because you specified the blocked
volume as the XP Snapshot S-VOL, the
command ends abnormally.
paircreate, pairsplit, pairresync,
pairresync -restore
Because you specified the volume that
is in process of formatting as the XP
Snapshot S-VOL, the command ends
abnormally.
973f
paircreate, pairsplit, pairresync,
pairresync -restore
Because you specified the volume
whose emulation type is other than
OPEN-V as the XP Snapshot S-VOL, the
command ends abnormally.
9740
paircreate
Because the volume you specified as
the XP Snapshot S-VOL has the
command device setting, the pair
cannot be created.
9742
9745
paircreate
paircreate
Because you specified an external
volume as the XP Snapshot S-VOL, the
pair cannot be created.
Because you specified a volume other
than V-VOL as the XP Snapshot S-VOL,
the pair cannot be created.
20 About XP Snapshot Operations
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Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)
SSB
RAID Manager Command
paircreate
Cause of Error
9746
9747
Because you specified a pool-VOL as
the XP Snapshot S-VOL, the pair cannot
be created.
paircreate
paircreate
paircreate
Because you specified the XP
Continuous Access P-VOL as the XP
Snapshot S-VOL, the XP Snapshot pair
cannot be created.
9748
9749
Because you specified the XP
Continuous Access S-VOL as the XP
Snapshot S-VOL, the XP Snapshot pair
cannot be created.
Because you specified the XP
Continuous Access Journal data volume
or journal volume in the intermediate
site of 3DC cascading configuration as
the XP Snapshot S-VOL, the XP Snapshot
pair cannot be created.
974a
974b
974c
974f
paircreate
paircreate
paircreate
All commands
paircreate
Because you specified the XP
Continuous Access Journal P-VOL as the
XP Snapshot S-VOL, the XP Snapshot
pair cannot be created.
Because you specified the XP
Continuous Access Journal S-VOL as the
XP Snapshot S-VOL, the XP Snapshot
pair cannot be created.
Because you specified the XP
Continuous Access Journal journal
volume as the XP Snapshot S-VOL, the
XP Snapshot pair cannot be created.
Because the volume you specified as
the S-VOL has an S-VOL Disable
attribute, the command ends
abnormally.
9750
9752
Because you specified the volume with
the VMA setting as the XP Snapshot
S-VOL, the pair cannot be created.
paircreate, pairsplit, pairresync,
pairresync -restore
Because the Max LBA size of the
volumes you specified as the XP
Snapshot P-VOL and S-VOL are
different, the command ends
abnormally.
9753
paircreate, pairsplit, pairresync,
pairresync -restore
Because the number of slots of the
volumes you specified as the XP
Snapshot P-VOL and S-VOL are
different, the command ends
abnormally.
9754
9756
paircreate
Because you specified the XP Thin
Provisioning V-VOL as the XP Snapshot
S-VOL, the XP Snapshot pair cannot be
created.
All commands
Because you specified the XP Business
Copy reserved volume as the XP
Snapshot P-VOL, the command ends
abnormally.
Status of the XP Snapshot Pairs
21
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Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)
SSB
RAID Manager Command
All commands
Cause of Error
9757
9758
9759
Because you specified the XP Auto LUN
source volume as the XP Snapshot
P-VOL, the command ends abnormally.
For information on using XP Auto LUN,
contact HP technical support (see
All commands
All commands
Because you specified the XP Auto LUN
target volume as the XP Snapshot
P-VOL, the command ends abnormally.
For information on using XP Auto LUN,
contact HP technical support (see
Because you specified the XP Auto LUN
reserved volume as the XP Snapshot
P-VOL, the command ends abnormally.
For information on using XP Auto LUN,
contact HP technical support (see
975a
975b
975c
All commands
All commands
All commands
Because you specified the XP Business
Copy P-VOL as the XP Snapshot S-VOL,
the command ends abnormally.
Because you specified the XP Business
Copy S-VOL as the XP Snapshot S-VOL,
the command ends abnormally.
Because you specified the XP Business
Copy reserved volume as the XP
Snapshot S-VOL, the command ends
abnormally.
975d
975e
975f
All commands
All commands
All commands
Because you specified the XP Auto LUN
source volume as the XP Snapshot
S-VOL, the command ends abnormally.
For information on using XP Auto LUN,
contact HP technical support (see
Because you specified the XP Auto LUN
target volume as the XP Snapshot
S-VOL, the command ends abnormally.
For information on using XP Auto LUN,
contact HP technical support (see
Because you specified the XP Auto LUN
reserved volume as the XP Snapshot
S-VOL, the command ends abnormally.
For information on using XP Auto LUN,
contact HP technical support (see
976a
976c
paircreate
pairsplit
Unavailable parameter (unsupported
parameter) is specified in the command.
Because the command was executed
with the PSUE option, the XP Snapshot
data cannot be stored.
22 About XP Snapshot Operations
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Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)
SSB
RAID Manager Command
pairresync
Cause of Error
976e
976e
976f
When XP Snapshot P-VOL and XP
Continuous Access S-VOL share the
volume, the status of the XP Continuous
Access pair is COPY. Therefore, the
snapshot data cannot be stored.
pairsplit
pairsplit
When the XP Snapshot P-VOL and XP
Continuous Access S-VOL share the
volume, the status of the XP Continuous
Access pair is COPY. Therefore, the
snapshot data cannot be stored.
When the XP Snapshot P-VOL and XP
Continuous Access Journal S-VOL share
the volume, the status of the XP
Continuous Access Journal pair is
COPY. Therefore, the snapshot data
cannot be stored.
9771
9772
paircreate
paircreate
Because you specified XP Continuous
Access Journal delta resync pair volume
as the XP Snapshot P-VOL, the XP
Snapshot pair cannot be created.
Because you specified the XP
Continuous Access Journal delta resync
pair volume as the XP Snapshot S-VOL,
the XP Snapshot pair cannot be
created.
9774
9776
paircreate
paircreate
When the XP Snapshot P-VOL and XP
Business Copy P-VOL share the volume,
the MU number you specified for the
XP Snapshot pair is already used by
the XP Business Copy pair. Therefore,
the XP Snapshot pair cannot be
created.
When the XP Snapshot P-VOL and XP
Business Copy P-VOL share the volume,
the XP Business Copy P-VOL you
specified for the XP Snapshot P-VOL has
consistency group settings. Therefore,
the XP Snapshot pair cannot be
created.
9777
9778
paircreate
paircreate
When the XP Snapshot P-VOL and XP
Business Copy S-VOL share the volume,
you specified the MU number zero (0)
for the XP Snapshot P-VOL. Therefore,
the XP Snapshot pair cannot be
created.
When the XP Snapshot P-VOL and XP
Business Copy S-VOL share the volume,
the XP Business Copy S-VOL you
specified for the XP Snapshot P-VOL has
consistency group settings. Therefore,
the XP Snapshot pair cannot be
created.
Status of the XP Snapshot Pairs 23
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Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)
SSB
RAID Manager Command
paircreate, pairsplit
Cause of Error
977a
977b
977c
When the XP Snapshot P-VOL and XP
Business Copy P-VOL share the volume,
the XP Business Copy pair was in the
process of resynchronization. Therefore,
the command ends abnormally.
paircreate, pairsplit
pairresync -restore
When the XP Snapshot P-VOL and XP
Business Copy S-VOL share the volume,
the status of the XP Business Copy pair
is other than PSUS. Therefore, the
command ends abnormally.
When the XP Snapshot P-VOL and XP
Business Copy P-VOL share the volume,
the status of the XP Business Copy pair
is other than PSUS or PSUE. Therefore,
the XP Snapshot pair cannot be
restored.
977d
pairresync -restore
When the XP Snapshot P-VOL and XP
Business Copy S-VOL share the volume,
the status of the XP Business Copy pair
is other than PSUS. Therefore, the XP
Snapshot pair cannot be restored.
977e
9783
pairsplit
Since the pool or the pool-VOL is
blocked, the XP Snapshot data cannot
be stored.
pairresync -restore
The XP Snapshot pair cannot be
restored for any of the following
reasons:
• The snapshot data of the XP
Snapshot pair for restoration is
being stored per consistency group.
• The P-VOL of the XP Snapshot pair
for restoration is used as the P-VOL
of another XP Snapshot pair, and
the snapshot data of the latter XP
Snapshot pair is being stored per
consistency group.
9786
9787
paircreate, pairsplit, pairresync,
pairresync -restore
Since quorum disks are specified as
P-VOLs of XP Snapshot pairs, the
command ends abnormally.
paircreate, pairsplit, pairresync,
pairresync -restore
Since quorum disks are specified as
S-VOLs of XP Snapshot pairs, the
command ends abnormally.
24 About XP Snapshot Operations
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Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued)
SSB
RAID Manager Command
paircreate
Cause of Error
978a
Because one of the following cases
happened, the XP Snapshot pair cannot
be created by specifying the
consistency number.
• The specified consistency group
number is in use for XP Business
Copy Software.
• The number of pairs has already
exceeded the maximum number of
pairs that can be created for one
consistency group.
• The pair which uses the same P-VOL
exists already in the specified
consistency group.
978b
978c
paircreate
pairsplit
The XP Snapshot pair cannot be created
because the specified consistency group
number is out of the range of the
number which can be specified.
The snapshot data cannot be stored
because the XP Continuous Access
Asynchronous Software pair status is
other than PSUS or PSUE when XP
Snapshot (P-VOL) and XP Continuous
Access Asynchronous Software (S-VOL)
share the volume.
978e
paircreate
The XP Snapshot pair for which the
consistency group is specified cannot
be created because the P-VOL or S-VOL
of the XP Continuous Access
Asynchronous Software pair is specified
as the P-VOL of the XP Snapshot pair.
9790
9793
B9A7
paircreate
The XP Thin Provisioning virtual volume
that is undergoing capacity expansion
is specified as the XP Snapshot P-VOL.
Therefore, the XP Snapshot pair cannot
be created.
paircreate
The XP Snapshot pair cannot be created
because the XP Thin Provisioning
Software V-VOL that is discarding zero
data is specified as a P-VOL of the XP
Snapshot pair.
All commands
The consistency group information
cannot be obtained because the XP
Snapshot is not installed.
Copy Threshold Option
If the load of the storage system increases, host server I/O performance (response) may be
degraded. If XP Snapshot performs the restore operation when the load of the storage system is
heavy, it is more likely that host server I/O performance (response) may be degraded. The Copy
Threshold option temporarily stops copy processing caused by the restore operation when the load
of the storage system is heavy. If you set this option in effect, you can minimize the degradation
of host I/O performance by temporarily stopping copy processing caused by the restore operation
when the load of the storage system is heavy.
Copy Threshold Option 25
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The Copy Threshold option is effective only when the load of the storage system is heavy. When
the Copy Threshold option is in effect, all the copy processing by the restore operation stops. For
information about the setting of the Copy Threshold option, call HP technical support.
Copy operations that are stopped by the Copy Threshold option will resume when the load of the
storage system becomes light. If this option is in effect, not only XP Snapshot copy operations, but
also the copy operations of the following program products, will stop when the load of the storage
system is heavy:
•
•
•
•
XP Business Copy Software
XP Business Copy for Mainframe
HP StorageWorks XP for FlashCopy Mirroring Software (both Version 1 and 2)
XP Auto LUN Software
Interoperability with Other Products and Functions
XP Snapshot can create pairs by sharing volumes with other program products, such as XP Business
Copy or XP Continuous Access. In addition, you can create XP Snapshot pairs by using volumes
to which attributes are assigned by the Data Retention Utility or RAID Manager. Table 5 (page 26)
shows whether or not XP Snapshot pairs can share volumes with other program products.
Table 5 Volume Sharing with Other Program Products
Volumes of Other Program Products
XP Business Copy pair P-VOL
XP Snapshot Pair P-VOL
XP Snapshot Pair S-VOL
Yes1
Yes2
Yes
No
No
No
No
No
XP Business Copy pair S-VOL
XP Continuous Access pair P-VOL
XP Continuous Access pair S-VOL
Yes
HP StorageWorks XP XP Continuous Access Yes
Journal Software pair P-VOL
XP Continuous Access Journal pair S-VOL Yes
No
No
No
Yes
Yes
Yes
Yes
Yes
Auto LUN source volume2
Auto LUN target volume2
Read Only volume
Yes
No
Yes
Yes
Yes
Yes
Yes
Protect volume
S-VOL Disable volume
Zero Read Capacity volume
Invisible volume
Yes: The XP Snapshot volume can be shared.
No: The XP Snapshot volume cannot be shared.
1 An XP Business Copy pair and an XP Snapshot pair cannot have the same mirror unit (MU) number. For
example, if the MU number of the XP Business Copy pair is 0, you cannot create an XP Snapshot pair
whose MU number is 0 and whose P-VOL is also used as an XP Business Copy P-VOL. Also, if the MU
number of the XP Snapshot pair is 1, you cannot create an XP Business Copy pair whose MU number is 1
and whose P-VOL is also used as an XP Snapshot P-VOL.
When XP Snapshot shares volumes with the other program products, some operations are restricted according
to the pair statuses. For detailed information, see the following sections.
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•
You need Data Retention Utility to set the Read Only attribute, the Protect attribute, or S-VOL
Disable. For details, see the HP StorageWorks XP24000/XP20000 Data Retention Utility User
Guide.
•
•
You need RAID Manager to set the Zero Read Capacity attribute or the Invisible attribute. For
details, see the HP StorageWorks XP RAID Manager User Guide.
You can check if the volume has the Read Only attribute, the Protect attribute, S-VOL Disable,
the Zero Read Capacity attribute, or the Invisible attribute by checking the Data Retention
Utility window. For details, see the HP StorageWorks XP24000/XP20000 Data Retention
Utility User Guide.
Data Retention Utility
Data Retention Utility can set four different kinds of access attributes on the volumes: Read/Write,
Read Only, Protect, and S-VOL Disable. XP Snapshot cannot create a pair by specifying a volume
whose access attribute is S-VOL Disable as the S-VOL. In addition, if the S-VOL Disable attribute
is set on the P-VOL of the XP Snapshot pair, you cannot restore the pair.
By using Data Retention Utility, you can set the Read/Write, Read Only, Protect, or S-VOL Disable
attribute on the volumes that are already used by the XP Snapshot pairs. However, when the pair
is in the following status, you cannot set the S-VOL Disable attribute on the pair volumes:
•
•
•
•
•
COPY*
SMPL(PD)*
COPY(RS)*
COPY(RS-R)
PSUE*
*: You can set S-VOL Disable on the P-VOL even if the pair status is COPY, SMPL(PD), COPY(RS),
or PSUE.
For detailed information about setting the access attribute, see the HP StorageWorks
XP24000/XP20000 Data Retention Utility User Guide.
Auto LUN
Regardless of the status of the migration plans of Auto LUN, you cannot perform any XP Snapshot
operations on a volume that is used by the migration plan. To use an XP Snapshot P-VOL as the
source volume for the migration plan, you need to create the XP Snapshot pair first, and then create
the migration plan.
When the XP Snapshot P-VOL and the source volume for the migration plan are shared, you can
execute the migration plan only when the XP Snapshot pair is in PAIR status. Deleting and canceling
the migration plan are always allowed. These operations are not affected by the XP Snapshot pair
status.
For information on using XP Auto LUN, contact HP technical support (see “Contacting HP”
XP Business Copy
show the relationship between XP Business Copy pair status and XP Snapshot operations when the
XP Snapshot P-VOL is shared with an XP Business Copy volume.
Interoperability with Other Products and Functions 27
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(page 29) show the relationship between the XP Snapshot pair status and XP Business Copy
operations for shared volumes.
For detailed information about XP Business Copy pair status and operations, see the HP
StorageWorks XP24000/XP20000 Business Copy Software User Guide.
•
Because the XP Snapshot S-VOL uses the data in the P-VOL, XP Business Copy's quick backward
pairresyncoperation (Quick Restore) is not allowed.
•
If a volume of an XP Business Copy pair has consistency group settings, you cannot use this
volume to create an XP Snapshot pair. Also, if you use a volume of an XP Snapshot pair to
create the XP Business Copy pair, you cannot set the consistency group to the XP Business
Copy pair.
•
If a volume of an XP Snapshot pair has consistency group settings, you cannot use this volume
to create an XP Business Copy Software pair. Also, if you use a volume of an XP Business
Copy pair to create the XP Snapshot pair, you cannot set the consistency group to the XP
Snapshot pair.
Table 6 XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Business Copy P-VOL
XP Snapshot Operations
XP Business Copy Pair Status
COPY
PAIR COPY
(SP)
PSUS
(SP)
PSUS
COPY
(RS)
COPY
(RS-R)
PSUE
Creating pairs (paircreate) Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Storing snapshot data
Yes
(pairsplit)
Restoring pairs (pairresync No
−restore)
No
Yes
Yes
No
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Deleting snapshot data
(pairresync)
Yes
Deleting pairs (pairsplit
−S)
Yes
Yes: Operation is allowed.
No: Operation is not allowed (command rejected).
Table 7 XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Business Copy S-VOL
XP Snapshot Operations
XP Business Copy Pair Status
COPY
PAIR COPY
(SP)
PSUS
(SP)
PSUS
COPY
(RS)
COPY
(RS-R)
PSUE
Creating pairs (paircreate) No
No
No
No
No
No
No
Yes
Yes
No
No
No
No
No
No
Storing snapshot data
N/A
(pairsplit)
Restoring pairs (pairresync N/A
−restore)
No
Yes
Yes
No
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
Yes
No
Yes
Yes
Deleting snapshot data
(pairresync)
N/A
Deleting pairs (pairsplit
−S)
N/A
Yes: Operation is allowed.
No: Operation is not allowed (command rejected).
N/A: Not applicable.
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Table 8 XP Business Copy Operations for Shared XP Snapshot P-VOL/XP Business Copy P-VOL
XP Business Copy Operations XP Snapshot Pair Status
COPY
PAIR PSUS
SMPL
(PD)
COPY
(RS)
COPY
(RS-R)
PSUE
Creating pairs (paircreate) Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Creating and splitting pairs
Yes
(paircreate −split)
Splitting pairs (pairsplit) Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Forward pair
Yes
Yes
No
resynchronization
(pairresync)
Normal backward pair
resynchronization
(pairresync −restore)
Yes
No
Yes
No
Yes
No
Yes
No
No
No
Yes
No
Quick backward pair
resynchronization
(pairresync −restore)
Suspending pairs (pairsplit Yes
−E)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Deleting pairs (pairsplit
−S)
Yes
Yes: Operation is allowed.
No: Operation is not allowed (command rejected).
Table 9 XP Business Copy Operations for Shared XP Snapshot P-VOL/XP Business Copy S-VOL
XP Business Copy Operations XP Snapshot Pair Status
COPY
PAIR PSUS
SMPL
(PD)
COPY
(RS)
COPY
(RS-R)
PSUE
Creating pairs (paircreate) No
No
No
No
No
No
No
No
No
No
No
No
No
Creating and splitting pairs
No
(paircreate −split)
Splitting pairs (pairsplit) Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Forward pair
Yes
Yes
No
resynchronization
(pairresync)
Normal backward pair
resynchronization
(pairresync −restore)
Yes
No
Yes
No
Yes
No
Yes
No
No
No
Yes
No
Quick backward pair
resynchronization
(pairresync −restore)
Suspending pairs (pairsplit Yes
−E)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Deleting pairs (pairsplit
−S)
Yes
Yes: Operation is allowed.
No: Operation is not allowed (command rejected).
Interoperability with Other Products and Functions 29
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XP Continuous Access or XP Continuous Access Journal
Continuous Access or XP Continuous Access Journal S-VOL” (page 30) show the relationship
between the XP Continuous Access or XP Continuous Access Journal pair status and XP Snapshot
operations when the XP Snapshot P-VOL is shared with an XP Continuous Access or XP Continuous
Access Journal volume.
Access or XP Continuous Access Journal S-VOL” (page 31) show the relationship between the XP
Snapshot pair status and XP Continuous Access or XP Continuous Access Journal operations for
shared volumes.
If a volume uses two mirrors in the 3DC multi-target configuration, the 3DC cascade configuration,
or the delta resync configuration consisting of three XP Continuous Access Journal sites, the volume
cannot be used as an XP Snapshot pair volume.
For detailed information about XP Continuous Access pair status and operations, see the HP
StorageWorks XP24000/XP20000 Continuous Access Software User Guide. For detailed
information about XP Continuous Access Journal pair status and operations, see the HP
StorageWorks XP24000/XP20000 XP Continuous Access Journal Software User Guide.
Table 10 XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP
Continuous Access Journal P-VOL
XP Snapshot Operations
XP Continuous Access / XP Continuous Access Journal Pair Status
COPY
Creating pairs (paircreate) Yes
PAIR
Yes
PSUS
Yes
PSUE
Yes
Suspending
Yes
Deleting
Yes
Storing snapshot data
(pairsplit)
Yes*
Yes*
Yes*
Yes*
Yes*
Yes*
Restoring pairs (pairresync No
−restore)
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
Yes
Deleting snapshot data
(pairresync)
Yes
Deleting pairs (pairsplit
−S)
Yes
Yes: Operation is allowed.
No: Operation is not allowed (command rejected).
* These pairs cannot be used as XP Continuous Access Journal delta resync pair volumes.
Table 11 XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP
Continuous Access Journal S-VOL
XP Snapshot Operations
XP Continuous Access / XP Continuous Access Journal Pair Status
COPY
Creating pairs (paircreate) Yes3
PAIR PSUS
PSUE
Yes3
Yes
SSWS1
Yes3
Suspending
Yes3
Deleting
Yes3
Yes3 Yes3
Storing snapshot data
No
Yes
Yes
Yes
Yes
Yes
(pairsplit)
Restoring pairs (pairresync No
−restore) 2
No
No
No
No
No
No
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Table 11 XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access
or XP Continuous Access Journal S-VOL (continued)
XP Snapshot Operations
XP Continuous Access / XP Continuous Access Journal Pair Status
COPY
PAIR PSUS
PSUE
SSWS1
Suspending
Deleting
Deleting snapshot data
(pairresync)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Deleting pairs (pairsplit
−S)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes: Operation is allowed.
No: Operation is not allowed (command rejected).
1: SSWS is a status of XP Continuous Access Journal pairs. XP Continuous Access pairs will not
change to SSWS status.
2: When you restore the XP Snapshot pair whose P-VOL is used as an XP Continuous Access or
XP Continuous Access Journal S-VOL, you need to switch operations from the local site to the remote
site by executing the horctakeovercommand.
3: These pairs cannot be used as XP Continuous Access Journal delta resync pair volumes
Table 12 XP Continuous Access / XP Continuous Access Journal Operations for Shared XP Snapshot
P-VOL/XP Continuous Access or XP Continuous Access Journal P-VOL
XP Continuous Access / XP XP Snapshot Pair Status
Continuous Access Journal
COPY
PAIR
Yes
Yes
Yes
Yes
Yes
PSUS
Yes
Yes
Yes
Yes
Yes
SMPL (PD) COPY (RS) COPY
(RS-R)
PSUE
Yes
Yes
Yes
Yes
Yes
Operations
Creating pairs
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
(paircreate)
Splitting pairs
(pairsplit)
Yes
-
Resynchronizing pairs
(pairresync)
Yes
No
Yes
No
Deleting pairs
(pairsplit −S)
Yes
Switching to remote site
(horctakeover)
Yes
Yes: Operation is allowed.
No: Operation is not allowed (command rejected)
N/A: Not Applicable
Table 13 XP Continuous Access/XP Continuous Access Journal Operations for Shared XP Snapshot
P-VOL/XP Continuous Access or XP Continuous Access Journal S-VOL
XP Continuous Access / XP XP Snapshot Pair Status
Continuous Access Journal
COPY
PAIR
PSUS
SMPL (PD) COPY (RS) COPY
(RS-R)
PSUE
No
Operations
Creating pairs
(paircreate)
No
No
No
Yes
Yes
Yes
No
Yes
Yes
No
Yes
No
Splitting pairs
Yes
Yes
Yes
Yes
Yes
(pairsplit)
Resynchronizing pairs
(pairresync)
Yes
Yes
Yes
Interoperability with Other Products and Functions
31
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Table 13 XP Continuous Access/XP Continuous Access Journal Operations for Shared XP
Snapshot P-VOL/XP Continuous Access or XP Continuous Access Journal S-VOL (continued)
XP Continuous Access / XP XP Snapshot Pair Status
Continuous Access Journal
COPY
PAIR
PSUS
SMPL (PD) COPY (RS) COPY
(RS-R)
PSUE
Yes
Operations
Deleting pairs
Yes
Yes
Yes
Yes
Yes
Yes
(pairsplit −S)
Switching to remote site
(horctakeover)
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes: Operation is allowed.
No: Operation is not allowed (command rejected).
HP StorageWorks XP Thin Provisioning Software
If you are to use both XP Snapshot and XP Thin Provisioning in one storage system, note the
following:
•
•
You cannot use pools for XP Thin Provisioning as pools for XP Snapshot, and vice versa.
If you create pools for XP Thin Provisioning, the number of the available pools for XP Snapshot
decreases according to the number of XP Thin Provisioning pools.
•
When an XP Thin Provisioning virtual volume is specified as the XP Snapshot P-VOL, you will
need to recreate the corresponding XP Snapshot virtual volume if you expand the size of the
XP Thin Provisioning volume.
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3 Preparing for XP Snapshot Operations
This chapter describes the requirements for using XP Snapshot, the installation procedure for XP
Snapshot, and calculation of the number of pairs that XP Snapshot can create. Read this chapter
before you start the operation of XP Snapshot.
•
•
•
•
•
System Requirements
XP Snapshot operations involve the storage system containing the primary and secondary volumes
and the licensed XP Snapshot and XP Business Copy feature enabled on Remote Web Console.
The system requirements for XP Snapshot are as follows.
Volume Requirements
XP Snapshot uses P-VOLs, S-VOLs, and pool-VOLs. The requirements (such as emulation type or
path definition) for the volumes used for XP Snapshot are described in this section.
XP Snapshot supports RAID1, RAID5, and RAID6.
Table 14 P-VOL Requirements
Item
Requirement
Volume type
Logical volume (LDEV)
LUSE volume can be specified.
NOTE: A LUSE P-VOL must be paired with an S-VOL of the same size and the
same structure. For example, if a LUSE P-VOL is created by combining volumes of
1 GB, 2 GB and 3 GB in this order, you must specify a LUSE volume which has
exactly the same size and the same combination order as the S-VOL.
You cannot specify the following volumes as XP Snapshot P-VOLs.
• Volumes used as pool-VOLs
• Volumes used as S-VOLs of XP Snapshot pairs
Emulation type
OPEN-V
16,384
Required
4 TB
Maximum number
Path definition
Maximum capacity
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Table 15 S-VOL Requirements
Item
Requirement
Volume type
V-VOL
You cannot specify the following volumes as XP Snapshot S-VOLs.
• Volumes used as S-VOLs of XP Snapshot pairs
• Volumes used by a pair or migration plan of another program product
NOTE: A LUSE S-VOL must be paired with a P-VOL of the same size and the same
structure.
Emulation type
Maximum number
Path definition
OPEN-V
16,384
Required
Table 16 Pool-VOL Requirements
Item
Requirement
Volume type
Logical volume (LDEV)
NOTE: Separating normal volumes and pool-VOLs into different parity groups is
recommended for the best performance.
You cannot specify the following volumes as XP Snapshot pool-VOLs:
• Volumes whose LDEV status is other than Normal and Normal (Quick Format)
You cannot specify volumes in blocked status or in copying process.
• LUSE volumes
• Volumes used as P-VOLs or S-VOLs of XP Snapshot pairs
• Volumes already registered in pools of XP Snapshot or XP Thin Provisioning
• Volumes used by a pair or migration plan of another program product
• Volumes that are set with the Protect or Read Only attribute, or the S-VOL Disable
setting by Data Retention Utility
• Volumes that have Cache Residency Manager settings
• System disks
• Command devices
• Quorum disks
You cannot mix the following pool-VOLs in a pool:
• Internal volumes and external volumes
• External cache enabled and external cache disabled volumes
Emulation type
RAID level
OPEN-V
All RAID levels are supported. You may register pool-VOLs whose RAID levels are
different in the same pool; however, HP recommends that you specify the same
RAID level for pool-VOLs registered in the same pool so that performance is not
decreased.
Encryption status
Drive type
Volumes of any encryption status (Enable, Disable, and hyphen) can be used for
pool-VOL.
FC, SATA, and SSD can be used as drive types.
When internal volumes are used, pool-VOLs with different drive types cannot be
intermixed in the same pool.
When external volumes are used, pool-VOLs with different drive types can be
intermixed in the same pool. For best performance, the use of volumes with different
drive types in a pool is not recommended.
34 Preparing for XP Snapshot Operations
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Table 16 Pool-VOL Requirements (continued)
Item
Requirement
Maximum number
8,192
However, the maximum number of pool-VOLs that can be registered in each pool
is 1024. That is, you can create up to 128 pools in one storage system.
In addition, the volume already registered as a pool-VOL in a pool cannot be
registered in another pool. Also note that if you create pools for XP Thin Provisioning,
the number of available pools for XP Snapshot will decrease according to the
number of XP Thin Provisioning pools.
Volume capacity
Path definition
8 GB to 4 TB.
NOTE: Dividing a parity group into at least 16 is recommended for the best
performance.
Not required.
The volumes with path definition cannot be specified as a pool-VOL
XP Snapshot Software Requirements
To use XP Snapshot, all storage system hardware, microcode, and software required for XP Business
Copy operations must be installed and enabled. You also need to purchase the license key for XP
Business Copy and install it in Remote Web Console. For detailed information about the license
key and software installation, see the HP StorageWorks XP24000/XP20000 Remote Web Console
User Guide.
Note that you must operate the Remote Web Console in modify mode to perform XP Snapshot
operations. Users in view mode can view XP Snapshot information, but they cannot create new
pairs or change the pair status. For information about how to set up and use the Remote Web
Console computer, see the HP StorageWorks XP24000/XP20000 Remote Web Console User
Guide.
License Requirements
Capacity used by XP Snapshot will be subtracted from the licensed capacity for XP Business Copy.
Therefore, you need to ensure that the licensed capacity for XP Business Copy is larger than the
capacity to be used by both XP Business Copy and XP Snapshot.
Even when a volume is used for multiple purposes, only the capacity of this volume itself is added
to the total volume capacity; there is no need to multiply the capacity of this volume by the number
of purposes it is used for. For example, even if you share one volume as XP Snapshot P-VOL and
XP Business Copy P-VOL, only the capacity of the volume itself is added to the total volume capacity
and there is no need for it to be doubled.
Shared Memory Requirements
The shared memory for the differential table and the V-VOL management area must be installed
on the base board. Note that you cannot share the memory for the V-VOL management area with
the memory of XP Thin Provisioning.
Requirements for RAID Manager
To use RAID Manager for XP Snapshot operations, you need to have one volume for RAID Manager's
command device. For details about how to set the command device, see the HP StorageWorks XP
RAID Manager User Guide.
Operational Requirements
This section explains the information you need to know when you perform XP Snapshot operations.
Operational Requirements 35
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Calculating the Maximum Number of Pairs
The number of XP Snapshot pairs that can be created for a storage system depends on the number
of differential tables, the capacity of shared memory for the V-VOL management area, or the
number of pair tables. Calculate the number of XP Snapshot pairs that can be created, first by
using the number of differential tables, then by using the capacity of shared memory for the V-VOL
management area, and finally by using the number of pair tables. Compare the three calculation
results. The smallest value is the maximum number of XP Snapshot pairs that can be created for
the storage system.
The following are the descriptions of the calculation of the number of XP Snapshot pairs that can
be created based on the number of differential tables, the capacity of shared memory for the V-VOL
management area, or the number of pair tables.
Calculating the Number of XP Snapshot Pairs by Using the Number of Differential Tables
If additional shared memory is installed, the maximum number of differential tables will be 26,176
or 57,600 or 104,768 or 146,688 or 209,600. To calculate the number of XP Snapshot pairs
that can be created, calculate the number of differential tables required for the XP Snapshot pair
and compare it with the number of differential tables of the whole storage system. Other than XP
Snapshot, the following program products use differential tables in the storage system:
•
•
•
•
•
XP Business Copy
ShadowImage for Mainframe
Compatible FlashCopy Version 1
Compatible FlashCopy Version 2
XP Auto LUN
If any of the mentioned program products other than XP Snapshot are used in the same storage
system, the number of differential tables that can be used by XP Snapshot pairs is calculated by
subtracting the number of differential tables used by the pairs (migration plan for XP Auto LUN) of
the previously mentioned program products from the number of differential tables of the whole
storage system.
See the manual of each program product for the calculation of the number of required differential
tables for XP Business Copy, XP Business Copy for Mainframe, Compatible FlashCopy Version 1,
Compatible FlashCopy Version 2, and XP Auto LUN.
For information on using XP Auto LUN, contact HP technical support (see “Contacting HP”
To calculate the number of differential tables for each XP Snapshot pair, use the following formula:
(X ÷ 256) ÷ (Z)
(X): Capacity of the volume (in kilobytes)
(Z): The number of slots that a differential table can manage (639 × 32)
You must round up the result of the calculation to the nearest whole number.
When the capacity of the volume (X in the formula) is 16 GB (16,777,216 kB), the number of
differential tables for each XP Snapshot pair can be calculated as follows.
Example
(16,777,216 ÷ 256) ÷ (639 × 32) = 3.19523
3.19523 will be 4 when the value after the decimal point is rounded up. This indicates that four
differential tables are required to create an XP Snapshot pair.
Assume that no other program products use differential tables in a storage system where the number
of differential tables is 26,176. The number of differential tables that XP Snapshot can use is
26,176. To create XP Snapshot pairs that require four differential tables for each pair, the calculation
will be as follows.
36 Preparing for XP Snapshot Operations
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26,176 ÷ 4 = 6,544
Thus, the maximum number of XP Snapshot pairs that can be created is 6,544.
Calculating the Number of XP Snapshot Pairs by Using the Shared Memory Capacity for the Virtual
Volume Management Area
The V-VOL management area consists of the following three elements:
•
•
•
Pool association information
Pool management block
Management information other than those above (shared memory is fixed to 10 MB)
The shared memory of the V-VOL management area differs according to the additional shared
Table 17 Additional Shared Memory for the V-VOL Management Area
Shared Memory
XP Snapshot 1
XP Snapshot 2
XP Snapshot 3
XP Snapshot 4
XP Snapshot 5
Shared Memory Capacity
751,619,276 bytes
1,073,741,823 bytes
2,147,483,647 bytes
3,221,159,935 bytes
4,294,901,759 bytes
To calculate the maximum number of XP Snapshot pairs that can be created for a subsystem, use
the following formula:
Maximum number of XP Snapshot pairs = Total capacity of P-VOLs ÷
{ (Capacity of one P-VOL ÷ 524,288) × 524,288}
524,288: Unit by which pool association information manages the capacity of a P-VOL (in kilobytes)
You must round up the value enclosed by the two upward arrows (↑) to the nearest whole number.
NOTE: Pool association information manages the P-VOL capacity by 524,288 KB.
To calculate the total capacity of P-VOLs, use the following formula:
Total capacity of P-VOLs = (S1 ÷ 8,736) × 2,048 × 256
S1: Shared memory capacity for pool association information (in bytes)
8,736: Capacity of pool association information per one table (in bytes)
2,048: Number of slots of the P-VOL which can be managed by the pool association information
for one table
256: Capacity of one slot (in kilobytes)
Note that you must round up the value enclosed by the two upward arrows (↑) to the nearest whole
number.
To calculate S1 (shared memory capacity for pool association information), use the following
formula:
S1 = S − S2 - 10,485,760
S: Shared memory capacity for the whole V-VOL management area (in bytes)
S2: Shared memory capacity for the pool management block (in bytes)
10,485,760: Fixed management information (in bytes)
Operational Requirements
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NOTE: You can check the capacity of the shared memory of the pool association information
To calculate S2 (shared memory capacity for pool management block), use the following formula:
S2 = [{(P ÷ 256) × 32} ÷ 8,736] × 8,736 + [{(Y ÷ 256) ÷ 270} ÷
2,048] × 8,736
P: Total capacity of all pools (in kilobytes)
Y: Total capacity of the pool-VOLs (in kilobytes)
256: Capacity of one slot (in kilobytes)
32: Capacity of the table which you need to manage the pool of one slot
8,736: Minimum size of the pool management block (in bytes)
270: Number of slots that can be managed by the slot management table
2,048: Number of slots that can be managed by the pool management block of the minimum size
Note that you must round up the value enclosed by the two upward arrows (↑) to the nearest whole
number.
To calculate P (total capacity of all pools), use the following formula:
P = Y – (4,116,000 + 84,000 × Number of pool-VOLs)
Following are notes on calculating the usage of a pool:
•
When copying snapshot data to the pool, XP Snapshot always consumes a multiple of 256
kB of the capacity of the pool. 256 kB will be consumed even if the snapshot data is smaller
than 256 kB.
•
When snapshot data is stored consecutively, the capacity of the snapshot data and the usage
of the pool will be almost the same. However, the usage of the pool will be larger than the
capacity of the snapshot data in some cases, when snapshot data is stored randomly.
When the shared memory capacity for the whole V-VOL management area (S in the previous
formula) is 1,024 MB, the capacity of the pool-VOL (Y in the previous formula) is 4 TB
(4,294,967,296 kB), the number of the pool-VOLs is 100, and the capacity of one P-VOL is 10
GB, the number of XP Snapshot pairs that can be created for a subsystem can be calculated as
follows.
Example
P = 4,294,967,296
= 4,282,451,296
(4,116,000 + 84,000 × 100)
S2 =
[{( 4,282,451,296 ÷ 256) × 32} ÷ 8,736
× 8,736 +
× 8,736
[{( 4,282,451,296 ÷ 256) ÷ 270} ÷ 2,048 ]
=↑61,275.917...
× 8,736 +
= 61,276 × 8,736 + 31 × 8,736
= 535,577,952
30.252...↑ × 8,736
S1 = 1,073,741,824 – 535,577,952 –10,485,760
= 527,678,112
Total capacity of P-VOLs (kB) =
( 527,678,112 ÷ 8,736)
× 2,048 × 256
= ↑60,402.714...
× 2,048 × 256
= 60,403 × 2,048 × 256
= 31,668,568,064
Maximum number of XP Snapshot pairs =
Maximum number of XP Snapshot pairs
= 31,668,568,064 ÷
38 Preparing for XP Snapshot Operations
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[ {(10 × 1,024 × 1,024) ÷ 524,288}
= 31,668,568,064 ÷ 10,485,760
= 3,020
× 524,288]
According to the result, the maximum number of XP Snapshot pairs that can be created is 3,020.
If shared memory is added to your storage system and you know the pool capacity, you can
the actual capacity of a P-VOL that can be created, use the above formulas.
Table 18 Rough Estimate of the Capacity of a P-VOL to be created
If a Shared Memory
is Added to
And If the Pool Capacity is
2,048
GB
4,096
GB
6,144
GB
8,192
GB
10,240
GB
12,288
GB
14,336
GB
20,480 30,720
GB
GB
XP24000
Disk
Array
XP
Snapshot
1
25.0 TB 10.5 TB
—
—
—
—
—
—
—
XP
Snapshot
2
42.0 TB 28.0 TB 13.5 TB
—
—
—
—
—
—
—
—
—
XP
100.0
85.0 TB 71.0 TB 56.0 TB 42.0 TB 28.0 TB 13.5 TB
Snapshot TB
3
XP
164.0
149.0
TB
134.0
TB
120.0
TB
106.0
TB
92.0 TB 77.5 TB 29.0 TB
Snapshot TB
4
XP
224.0
209.0
TB
194.0
TB
184.0
TB
170.0
TB
156.0
TB
141.5
TB
89.0 TB 14.0 TB
Snapshot TB
5
XP20000 Disk
25.0 TB 10.5 TB
—
—
—
—
—
—
—
Array
— Not applicable
Calculating the Number of XP Snapshot Pairs Using the Number of Pair Tables
Pair tables are used by Compatible FlashCopy Version 2 and XP Snapshot pairs in order to store
control information which is needed to manage the pairs. To create a Compatible FlashCopy
Version 2 pair or an XP Snapshot pair, you need one pair table for each pair.
Up to 1,048,575 pair tables are available in one subsystem.
Among storage system program products, only Compatible FlashCopy Version 2 and XP Snapshot
use pair tables. Therefore, if you use Compatible FlashCopy Version 2, the number of available
pair tables for XP Snapshot pairs can be calculated by subtracting the number of differential tables
used by the Compatible FlashCopy Version 2 pairs from the number of pair tables for the whole
subsystem.
For information about how to check the number of pair tables used by Compatible FlashCopy
Version 2 pairs (that is, the number of already created Compatible FlashCopy Version 2 pairs),
see the HP StorageWorks XP24000/XP20000 for FlashCopy Mirroring Software User Guide.
For example, when the number of pair tables used by Compatible FlashCopy Version 2 is 30,000,
the number of XP Snapshot pairs that can be created for a subsystem can be calculated as follows.
Example
1,048,575 – 30,000 = 1,018,575
According to this result, the maximum number of XP Snapshot pairs that can be created is
1,018,575.
Operational Requirements 39
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Performance Considerations
If XP Snapshot performs a restore operation when the load of the subsystem is heavy, it is more
likely that host server I/O performance (response) may be degraded. The Copy Threshold option
allows you to effectively decrease the load of the subsystem.
Notes on Defining Pool Capacity
The pool capacity is the total capacity of the pool volumes that are defined in the pool. If the pool
capacity is not enough, the status of the XP Snapshot pairs could change to PSUE. When you
create a pool, you must estimate the copy capacity (that is, the capacity of the snapshot data to
be copied to the pool) and set enough pool capacity for the estimated copy capacity. If the copy
capacity would change according to the period of time, set enough pool capacity for the largest
copy capacity.
•
When snapshot data is copied to a pool, a multiple of 256 kB of the pool will be consumed.
Even if the capacity of the snapshot data is less than 256 kB, you need a 256 kB area in the
pool for the data.
•
If the same area in the P-VOL is updated more than one time, the snapshot data for the area
is copied to the pool only when the first update has taken place. Therefore, when the same
area in the P-VOL is updated only once, the written data capacity is equal to the copied data
capacity. However, when the same area in the P-VOL is updated repeatedly, the copy capacity
will be smaller than the written data capacity.
•
HP recommends that you use a volume whose capacity is a multiple of 256 kB as a pool-VOL.
If the capacity of the volume that is specified as a pool-VOL is not a multiple of 256 kB, the
capacity that is less than 256 kB will be rounded off. For example, if you add a volume of
100.125 MB as a pool-VOL, 125 kB will be rounded off and the capacity of the pool will
increase only by 100 MB.
When you estimate the copy capacity, you need to consider how many generations of snapshot
data you would like to take.
•
In case of one snapshot data
If the same area in the P-VOL is updated only once, the copy capacity is equal to the capacity
of the data that is written between the storing and the deletion of the snapshot data.
For example, if you want make a backup by using XP Snapshot, you can back up the data
from the S-VOL after storing the snapshot data, and then delete the snapshot data. In this case,
only the data that was written during the backup needs to be copied to the pool, and there
is only one snapshot data. Therefore, you can make a backup with the pool that has a small
capacity. However, because you need to read a large amount of data from the S-VOL during
the backup, the access to the P-VOL increases and consequently the host I/O performance
may be lowered.
•
In case of multiple snapshot data
After storing each snapshot data, if the same area in the P-VOL is updated only once until the
snapshot data is deleted, the copy capacity is equal to the capacity of the data that is written
between the storing and the deletion of the snapshot data. If there is more than one P-VOL,
the copy capacity is equal to the total capacity of the data written to each P-VOL.
When you store more than one snapshot data in the pool, some XP Snapshot pairs may share
snapshot data in the pool. While the snapshot data is shared, you can delete the pairs but
cannot delete the shared snapshot data from the pool. The shared snapshot data will not be
deleted from the pool until all the XP Snapshot pairs that share the snapshot data are deleted.
Though you estimate the copied data capacity and set the pool capacity according to the notes
implement measures.
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Notes on Using External Volumes as Pool-VOLs
By using XP External Storage, you can connect multiple storage systems to the XP24000/20000
Disk Array single storage system. In that case, the original storage system is called the local storage
system, and the connected storage systems are called external storage systems. A volume in an
external storage system is called an external volume. A volume in the local storage system is called
an internal volume.
If XP External Storage is installed, as well as internal volumes, external volumes can be used as
pool-VOLs. However, external volumes are more likely to fail than internal volumes. In addition,
solutions for external volume failures are more complicated than those for internal volume failures.
To minimize the effects of the failures, HP recommends that you use external volumes as follows:
•
•
Specify the external volumes of only one external subsystem for one pool.
Do not specify both internal and external volumes as pool-VOLs in one pool.
You may specify the external volumes of several external subsystems for one pool, or use both
internal and external volumes as pool-VOLs in one pool, but in that case, consider that problems
such as volume blockade may more easily happen. For example, if a problem occurs and the
external volume which is being used as a pool-VOL is blocked, the pool becomes blocked as well.
For information about how to recover the blocked pool, see “Procedure to Recover a Blocked Pool”
For details about external subsystems and the solutions for the errors related to external volumes,
see the HP StorageWorks XP24000/XP20000 External Storage Software User Guide.
Requirements for Maintaining XP Snapshot
This section describes the notes on switching off the power supply or replacing the microcode
offline while XP Snapshot is in use.
Notes on Replacing the Microcode Offline
Usually, replacement of microcode is performed online, but in some cases, such as when the
configuration of the shared memory needs to be changed, replacement of microcode will be
performed offline. If the microcode is replaced offline, pool information or XP Snapshot pair
information in the shared memory will be lost. Therefore, you need to create the pools and the
pairs again after the microcode is replaced.
Notes on Switching Off the Power Supply
Before you switch off the power supply while XP Snapshot is running, stop the host I/O operations.
When you switch on the power supply again, XP Snapshot behaves differently according to whether
information in the shared memory remains before and after switching off the power supply.
•
If information in the shared memory remains before and after switching off the power supply
If information in the shared memory remains before and after switching off the power supply,
usually you can use the pools and the XP Snapshot pairs that you had been using before the
switch-off. However, because the storage system checks the status of the pools and the pool
volumes, if the pool volumes are blocked at that moment, the pool will be blocked and the
status of the XP Snapshot pairs changes to PSUE. When this occurs, you need to recover the
pools after the switch-on. For details about recovering the pools, see “Procedure to Recover
When you store snapshot data by a consistency group, if the power supply is switched off
before the status of all the pairs in the same consistency group has changed completely, the
Requirements for Maintaining XP Snapshot
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storing of snapshot data will not resume, and the status of some pairs may remain unchanged
when the power supply is switched again.
•
If information in the shared memory is lost after switching off the power supply
The storage system has a battery to maintain the information in the shared memory. However,
when a certain time elapses after the breaker is turned off, the battery will die and the
information in the shared memory will be lost. If information in the shared memory is lost after
switching off the power supply, the information about the pools and the XP Snapshot pairs is
erased. Therefore, you need to create the pools and the pairs again after the switch-on.
For information about the amount of time before the information in the shared memory is lost
when the breaker is turned off, ask HP technical support.
Installing and Uninstalling XP Snapshot
This section describes the procedure for installing and uninstalling XP Snapshot.
Installing XP Snapshot
The following steps describe the installation procedure for XP Snapshot:
1. Install additional shared memory for differential tables.
2. Install additional shared memory for the V-VOL management area.
3. Install XP Business Copy, which is the prerequisite program product for XP Snapshot.
4. Install XP Snapshot.
•
Call HP technical support to install additional shared memory for the V-VOL management
area. The shared memory for XP Snapshot and the shared memory for XP Thin Provisioning
must be installed separately.
•
Once you install additional shared memory for the V-VOL management area, you cannot
uninstall it partially. To uninstall the additional shared memory for the V-VOL management
area, you need to uninstall the whole shared memory that was added for the V-VOL
management area.
•
•
•
•
Because the total capacity of XP Snapshot P-VOLs and pools will be considered as the capacity
used by XP Snapshot, you need to purchase enough license capacity for them.
Uninstalling XP Snapshot
The following steps describe the uninstallation procedure for XP Snapshot:
1. Delete all XP Snapshot pairs.
2. Delete all pools.
3. Delete all V-VOLs.
4. Uninstall XP Snapshot.
For detailed information about the procedures for deleting the pairs, pools, and V-VOLs, see
Starting XP Snapshot
After you have enabled the feature for the Remote Web Console and prepared for XP Snapshot
operations, you are ready to start up XP Snapshot. However, because XP Snapshot does not have
its own starting menu, you need to start up XP Business Copy and LUN Expansion (LUSE)/Virtual
LVI/LUN (VLL) in order to use XP Snapshot.
42 Preparing for XP Snapshot Operations
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To start XP Business Copy or LUN Expansion (LUSE)/Virtual LVI/LUN (VLL) and display the window:
1. Display the Remote Web Console main window.
For information about how to display the Remote Web Console main window, see the HP
StorageWorks XP24000/XP20000 Remote Web Console User Guide.
2. Click Go and then XP Business Copy or Volume Manager on the menu bar of the Remote Web
Console main window.
Names of the windows that you need for XP Snapshot operation appear in the submenu.
3. Click the name of the window you want to display.
XP Business Copy or LUN Expansion (LUSE)/Virtual LVI/LUN (VLL) starts, and the window
whose name you clicked appears in the submenu.
Starting XP Snapshot 43
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4 Using the XP Snapshot GUI
XP Snapshot information and operations are presented on Remote Web Console windows that
are also used for XP Business Copy and LUN Expansion (LUSE)/Virtual LVI/LUN (VLL). XP Snapshot
uses the XP Business Copy Pair Operation, XP Business Copy History, XP Business Copy XP Snapshot,
LUSE/VLL Pool, and LUSE/VLL V-VOL windows.
This chapter describes the Remote Web Console windows that present XP Snapshot information
and allow you to perform XP Snapshot operations.
•
•
•
•
•
Pair Operation Window
The XP Business Copy's Pair Operation window displays information about both XP Business Copy
and XP Snapshot pairs. This section explains only the items related to the XP Snapshot pairs. For
details about the items related to the XP Business Copy pairs, see the HP StorageWorks
XP24000/XP20000 Business Copy Software User Guide.
44 Using the XP Snapshot GUI
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Figure 6 Pair Operation Window
Table 19 Pair Operation Window Items
Item
Description
Display Filter button
Displays the Display Filter dialog box (“Display Filter Dialog
Box (XP Snapshot Tab Selected)” (page 68)) where you
can filter the volumes displayed in the volume list.
Tree (the area in the left portion of the window)
Displays the ports that are defined paths or host groups,
in tree style. When you select the items in the tree,
information about XP Business Copy pairs or XP Snapshot
pairs will be displayed in the volume list on the right of the
window. Note that no volume will be displayed when you
select Subsystem, which is shown in the top of the tree.
Volume list (the area in the upper right portion of the
window)
Displays all available volumes.
Icons
The following are the XP Snapshot icons and their
meanings. For the icons related to XP Business Copy, see
the HP StorageWorks XP24000/XP20000 Business Copy
Software User Guide.
•
•
•
•
: disk subsystem (storage system)
: port
: host group
: LUN or SMPL volume
•
: XP Snapshot pair
Preview (the area under the volume list)
Displays the operations that have been performed in the
Pair Operation window, but are still not applied to the
storage system.
Pair Operation Window 45
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Table 19 Pair Operation Window Items (continued)
Item
Description
Apply button
Applies the operations displayed in the Preview list to the
storage system. If the specified operations are applied
successfully, the Preview list will be cleared.
If an error occurs during an operation, the failed operation
will remain in the Preview list with an error icon (
)
displayed in front. Details about the error (error code and
message) are displayed on the error dialog box. For details
about the error codes of XP Snapshot, see HP
StorageWorks XP24000/XP20000 Remote Web Console
Error Codes.
Cancel button
Cancels all the operations set in the Preview list.
Volume List
or XP Business Copy, based on the filter options you select in the tree (along the left side portion
of the window). When you select a port or host group in the tree on the left side of the Pair
Operation window, information about the volumes that belong to what you selected in the tree will
be displayed in the volume list. You can sort the volumes by any of the items displayed as the
column header of the Volume List. You can also filter the volumes by reserve attribute, pair condition,
and pair status using the Display Filter dialog box.
The number of volumes that can be displayed in the Volume List at the same time is limited to 1,024
volumes. In case the number of volumes defined in the storage system exceeds this limit, use the
Previous and Next buttons on the upper right of the Volume List to turn the pages of the Volume
List and see the entire list.
Figure 7 Volume List
Table 20 Volume List Items
Item
Description
Previous button
Displays the previous page of the volume list when the total
number of the volumes in the storage system is more than
1,024, the Previous button. If the number of the items in
the volume list is less than 1,024, this button is grayed out.
Next button
Displays the next page of the volume list when the total
number of the volumes in the storage system is more than
1,024, the Next button. If the number of the items in the
volume list is less than 1,024, this button is unavailable.
46 Using the XP Snapshot GUI
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Table 20 Volume List Items (continued)
Item
Description
Message
Displays when there is no volume or pair to be displayed.
If you see the message in the Volume List, click a different
icon in the tree on the left area of the Pair Operation
window.
P-VOL
Displays information about P-VOL in
AAA-BB-CCC(XX:YY:ZZ) format.
• AAA: The port ID (cluster and channel number)
• BB: The group number of the host group
• CCC: LU number
• XX:YY:ZZ: LDKC number:CU number:LDEV number
An LDEV number that ends with # indicates that the LDEV
is an external volume (for example, 00:00:01#). An LDEV
number that ends with a letter X indicates that the LDEV is
a virtual volume used by Dynamic Provisioning (for
example, 00:00:00X). For details regarding external
volumes, see the HP StorageWorks XP24000/XP20000
External Storage Software User Guide. For information
about XP Thin Provisioning, see the HP StorageWorks
XP24000/XP20000 Thin Provisioning Software User
Guide.
MU
Displays the snapshot ID of an XP Snapshot pair. If the pair
is in SMPL status, three hyphens (- - -) will be displayed.
For details about what will be displayed in this item if you
select XP Business Copy pairs, see the HP StorageWorks
XP24000/XP20000 Business Copy Software User Guide.
Status
Displays the status of an XP Snapshot pair or an XP Business
Copy pair. For details about the status of an XP Snapshot
details about the XP Business Copy pair status, see the HP
StorageWorks XP24000/XP20000 Business Copy
Software User Guide.
S-VOL
Displays information about S-VOL in
AAA-BB-CCC(XX:YY:ZZ) format.
• AAA: The port ID (cluster and channel number)
• BB: The group number of the host group
• CCC: LU number
• XX:YY:ZZ: LDKC number:CU number:LDEV number
For LUs with more than one path, only one path is listed.
The path is connected to the first port within the ports
configured to a path that are shown in the tree view of the
Pair Operation Window.
An LDEV number that ends with # indicates that the LDEV
is an external volume (for example, 00:00:01#). An LDEV
number that ends with the letter X indicates that the LDEV
is a virtual volume used by XP Thin Provisioning (for
example, 00:00:00X). For details regarding external
volumes, see the HP StorageWorks XP24000/XP20000
External Storage Software User Guide. For information
about XP Thin Provisioning, see the HP StorageWorks
XP24000/XP20000 Thin Provisioning Software User
Guide.
Pair Operation Window
47
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Table 20 Volume List Items (continued)
Item
CTG
Description
Displays the consistency group number of the XP Snapshot
pair. When the consistency group is not specified, dotted
lines (- - -) are displayed. For information about what will
be displayed for an XP Business Copy pair, see the HP
StorageWorks XP24000/XP20000 Business Copy
Software User Guide.
SvolMode
Displays the status of the S-VOL. When the data is not
written in the S-VOL, (- - -) appears. When the data is
written in the S-VOL, W appears. For information about
what is displayed for an XP Business Copy pair, see the
HP StorageWorks XP24000/XP20000 Business Copy
Software User Guide.
Copy Pace
Sync.
Displays dotted lines (- - -). For information about what is
displayed for an XP Business Copy pair, see the HP
StorageWorks XP24000/XP20000 Business Copy
Software User Guide.
Displays the consistency rate of the P-VOL and the S-VOL
for the XP Snapshot pair. Displayed information changes
according to the pair status. See “Information Displayed
Emulation
Displays the emulation type of the volume.
Capacity(MB)
Displays the storage capacity of the volume. The unit is
megabyte (MB).
CLPR(P)
CLPR(S)
Menu
Displays the cache logical partition of the P-VOL.
Displays the cache logical partition of the S-VOL.
Displays the menus in “Menus of the Volume List of XP
Snapshot Pair Is Selected)” (page 49) when you select and
right-click the XP Snapshot pair volumes in the volume list.
Table 21 Information Displayed in Sync.
Pair Status
SMPL
Displayed Information
(- - - ) is displayed.
COPY
The consistency rate of the P-VOL and the S-VOL is displayed by percent (%).
PAIR
COPY(RS)
COPY(RS-R)
PSUS
PSUE
(- - -) is displayed.
SMPL(PD)
For information about what is displayed if it is an XP Business Copy pair, see the HP StorageWorks
XP24000/XP20000 Business Copy Software User Guide.
48 Using the XP Snapshot GUI
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Table 22 Menus of the Volume List of XP Business Copy's Pair Operation Window (In Case an XP
Snapshot Pair Is Selected)
Command
Function
Detail
Opens the Detail dialog box (“Detail Dialog Box for an XP Snapshot Pair”
Pairsplit-S
S-VOL Path
Information
displays the number of pairs or reserved volumes.
•
•
The grayed-out commands are for XP Business Copy pairs. For details about these commands,
see the HP StorageWorks XP24000/XP20000 Business Copy Software User Guide.
When you select the Paircreateor the Pairsplitcommand from the menu, the Paircreate
dialog box or the Pairsplit dialog box will be displayed. However, you cannot create or split
XP Snapshot pairs by using these dialog boxes.
Preview List
The Preview list is in the lower right portion of the XP Business Copy's Pair Operation window.
The Preview list displays the content of XP Business Copy or XP Snapshot operations that are not
applied to the storage system yet.
Pair Operation Window 49
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Figure 8 Preview List
Table 23 Preview List Items
Item
Description
P-VOL
Displays information about the P-VOL in
AAA-BB-CCC(XX:YY:ZZ) format.
• AAA: The port ID (cluster and channel number)
• BB: The group number of the host group
• CCC: LU number
• XX:YY:ZZ: LDKC number:CU number:LDEV number
An LDEV number that ends with a # indicates that the LDEV
is an external volume (for example, 00:00:01#). An LDEV
number that ends with the letter X indicates that the LDEV
is a virtual volume used by XP Thin Provisioning (for
example, 00:00:00X). For details regarding external
volumes, see the HP StorageWorks XP24000/XP20000
External Storage Software User Guide. For information
about XP Thin Provisioning, see the HP StorageWorks
XP24000/XP20000 Thin Provisioning Software User
Guide.
MU
Displays the ID for the XP Snapshot pair. If the pair is in
SMPL status, - - - will be displayed. For details about what
will be displayed in this item if you select XP Business Copy
pairs, see the HP StorageWorks XP24000/XP20000
Business Copy Software User Guide.
S-VOL
Displays information about the S-VOL in
AAA-BB-CCC(XX:YY:ZZ) format.
• AAA: The port ID (cluster and channel number)
• BB: The group number of the host group
• CCC: LU number
• XX:YY:ZZ: LDKC number:CU number:LDEV number
An LDEV number that ends with a # indicates that the LDEV
is an external volume (for example, 00:00:01#). An LDEV
number that ends with the letter X indicates that the LDEV
is a virtual volume used by XP Thin Provisioning (for
example, 00:00:00X). For details regarding external
volumes, see the HP StorageWorks XP24000/XP20000
External Storage Software User Guide. For information
about XP Thin Provisioning, see the HP StorageWorks
XP24000/XP20000 Thin Provisioning Software User
Guide.
Copy Pace
Displays dotted lines - - -. For information about what will
be displayed for an XP Business Copy pair, see the HP
StorageWorks XP24000/XP20000 Business Copy
Software User Guide.
50 Using the XP Snapshot GUI
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Table 23 Preview List Items (continued)
Item
Description
CLPR(P)
CLPR(S)
Error Code
Displays the cache logical partition of the P-VOL.
Displays the cache logical partition of the S-VOL.
Displays the code that indicates the cause of the error. If
there is no error, dotted lines (- - -) will display.
Menu
When you select and right-click items in the Preview list,
the menu displays the following commands:
• Delete: Cancels the selected operation(s) in the
Preview list.
• Error Detail: Displays the error message box, which
displays the error code and message. For the XP
Snapshot error codes, see the HP StorageWorks
XP24000/XP20000 Remote Web Console Error Codes.
• Note: The grayed out commands are for XP Business
Copy pairs. For details about those commands, see the
HP StorageWorks XP24000/XP20000 Business Copy
Software User Guide.
Preview X(Y)
X indicates the total number of the operations displayed
in the Preview list.
Y indicates the type of operation.
History Window
on the XP Snapshot pairs, such as creating or deleting pairs and storing snapshot data.
Figure 9 History Window
The upper area of the History window lists the operation history for XP Business Copy pairs, and
the lower area of the window lists the operation history of XP Snapshot pairs. For details about
the operation history of XP Business Copy pairs, see the HP StorageWorks XP24000/XP20000
Business Copy Software User Guide. The lower portion of the History window displays the following
items.
History Window
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Table 24 History Window Items
Item
Description
Previous button
Allows you to return to the previous page of the list. This
button is selectable only when the number of operation
histories in the storage system exceeds 16,384, which is
the maximum number of histories that can be displayed on
one page. The button is grayed-out if the total number of
operation histories in the storage system is less than
16,384.
Next button
Allows you to turn to the next page of the list. This button
is selectable only when the number of operation histories
in the storage system exceeds 16,384 volumes, which is
the maximum number of histories that can be displayed on
one page. The button is grayed-out if the total number of
operation histories in the storage system is less than
16,384.
Date
Displays the date and time (YYYY/MM/DD hour/min/sec)
when an XP Snapshot pair or volume operation has been
performed.
P-VOL
Displays the CU number and LDEV number of a P-VOL used
for an XP Snapshot operation.
An LDEV number that ends with a # mark indicates that
the LDEV is an external volume (for example, 00:00:01#).
An LDEV number that ends with a letter X indicates that the
LDEV is a virtual volume used by XP Thin Provisioning (for
example, 00:00:00X). For details regarding the external
volumes, see the HP StorageWorks XP24000/XP20000
External Storage Software User Guide. For information
about XP Thin Provisioning, see the HP StorageWorks
XP24000/XP20000 Thin Provisioning Software User
Guide.
S-VOL
Displays the CU number and LDEV number of an S-VOL
used for an XP Snapshot operation. When there is no
S-VOL, - - - will be displayed.
An LDEV number that ends with a V indicates that the LDEV
is a virtual volume (for example, 00:00:01V).
MU
Displays the XP Snapshot data ID of snapshot data used
for an XP Snapshot operation.
Pool ID
Code
Displays the Pool ID of the pool in which the XP Snapshot
pair is registered.
Displays the reference code for XP Snapshot. For details
Message
Displays the message that indicates the operation or status
Table 25 XP Snapshot History Reference Codes and Messages
Code
0x2001 PAIR
0x2011 PSUS
Message
Description
An XP Snapshot pair was created.
An XP Snapshot pair was split.
0x2021 SMPL
An XP Snapshot pair was deleted.
Restoration of an XP Snapshot pair started.
Restoration of an XP Snapshot pair ended normally.
0x2030 COPY(RS-R) START
0x2031 COPY(RS-R) END
52
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Table 25 XP Snapshot History Reference Codes and Messages (continued)
Code
Message
Description
0x2032 COPY(RS-R) ENDED
ABNORMAL
Restoration of an XP Snapshot pair ended abnormally.
0x2051 COPY(RS)
Snapshot data was deleted.
0x2070 PSUE(ABNORMAL END)
A failure occurred and the status of the XP Snapshot pair
changes to PSUE.
0x2040 INITIALIZE START
0x2041 INITIALIZE END
Initialization started.
Initialization ended normally.
0x2042 INITIALIZE ENDED ABNORMAL Initialization ended abnormally.
XP Snapshot Window
Figure 10 XP Snapshot Window
The XP Snapshot window displays the following items.
XP Snapshot Window 53
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Table 26 The XP Snapshot Window Display
Item
Description
Tree (the area in the left portion of the window)
Pools in the disk storage system are displayed in the tree
style. The following icons are displayed in the tree.
•
•
: storage system
Pool: X : pool in normal status (X indicates pool ID)
•
•
Pool: X : pool whose usage rate exceeds the
threshold (X indicates pool ID)
Pool: X : blocked pool (X indicates pool ID)
Pool/volume list (in the upper right portion of the window) If you select Subsystem in the tree, the pool/volume list
displays the list of the pools in the storage system. When
you select Subsystem in the tree, the following items will
be displayed in the pool/volume list.
•
•
•
Pool ID: pool ID
Capacity(GB): storage capacity of the pool
Used Capacity(GB): capacity of the pool that is used by
the XP Snapshot pairs
•
•
•
Usage rate: usage rate of the pool
Pool-VOL(s): total number of the pool-VOLs in the pool
XP Snapshot pair(s): total number of snapshot data
stored in the pool
If you select a pool icon in the tree, the pool/volume list
displays the list of the XP Snapshot pairs in the pool. When
you select a pool icon in the tree, the following items will
be displayed in the pool/volume list.
•
P-VOL: port ID, the group number of the host group,
and LUN (LDKC number, CU number, and LDEV number
of the volume) of the P-VOL.
For P-VOL LUs with more than one path, only one path
is listed. The path is connected to the first port within
the ports configured to a path that is shown in the tree
view of the Pair Operation Window.
•
•
•
MU: snapshot ID
Status: status of the XP Snapshot pair
S-VOL: port ID, the group number of the host group,
and LUN (LDKC number, CU number, and LDEV number
of the volume) of the S-VOL.
For S-VOL LUs with more than one path, only one path
is listed. The path is connected to the first port within
the ports configured to a path that is shown in the tree
view of the Pair Operation Window. When the volume
is unmounted, dotted lines (- - -) will display.
•
•
•
Pool used(GB): capacity of the pool that is used by the
S-VOL
Sync.: consistency rate of the data of the P-VOL and the
S-VOL
CTG: consistency group number of the XP Snapshot pair
When the consistency group is not specified, dotted
lines (- - -) will display.
54 Using the XP Snapshot GUI
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Table 26 The XP Snapshot Window Display (continued)
Item
Description
Pool Association Inf.: X GB / Y GB
X indicates the capacity of the pool association information
in use.
Y indicates the maximum possible capacity of the pool
association information, including the capacity of the pool
association information in use.
The maximum possible capacity of pool association
information is calculated, based on the assumption that the
remaining space of the V-VOL management area is used
as pool association information. If the remaining space of
the V-VOL management area is used for pool management
blocks, the maximum possible capacity of pool association
information is decreased due to decrease in the remaining
space of the V-VOL management area.
Pool Mng. Block: X GB / Y GB
X indicates the capacity of the pool management blocks
in use.
Y indicates the maximum possible capacity of the pool
management blocks, including the capacity of the pool
management blocks in use.
The maximum possible capacity of pool management
blocks is calculated, based on the assumption that the
remaining space of the V-VOL management area is used
as pool management blocks. If the remaining space of the
V-VOL management area is used for pool association
information, the maximum possible capacity of pool
management blocks is decreased due to decrease in the
remaining space of the V-VOL management area.
Pool association information and a pool management block
are the elements of the V-VOL management area. You need
to know the capacity of these two elements to calculate the
number of XP Snapshot pairs you can create. For
information about how to calculate the number of XP
Snapshot pairs you can create, see “Calculating the
Menu (pool/volume list)
Preview list
When you select a pool icon in the tree, and then select
and right-click the XP Snapshot pairs in the pool/volume
list, a menu Pairsplit-S will be displayed. If you select this
menu, the Pairsplit-S dialog box (“Pairsplit-S Dialog Box”
(page 90)) will be displayed.
Displays the content of the operations that have been set
or specified in the XP Snapshot window, but are still not
applied to the storage system. To apply the operations
displayed in the Preview list to the storage system, click
Apply.
The Preview list displays the following items.
•
P-VOL: port ID, the group number of the host group,
and LUN of the P-VOL
•
•
MU: snapshot ID
S-VOL: port ID, the group number of the host group,
and LUN of the S-VOL
•
•
Error Code: code that indicates the cause of the error.
If there is no error, - - - will be displayed
Preview X(Y): total number of the operations displayed
in the Preview list (X) and the type of operation (Y)
XP Snapshot Window 55
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Table 26 The XP Snapshot Window Display (continued)
Item
Description
Menu (Preview list in the XP Snapshot window)
If you select and right-click the operations in the Preview
list, the menu appears.
Delete: Cancels the selected operation and deletes the
operation from the Preview list in the XP Snapshot window.
Error Detail: Displays the error message box, which
displays the error code and message. For the XP Snapshot
error codes, see the HP StorageWorks XP24000/XP20000
Remote Web Console Error Codes.
Apply button
Applies the operations displayed in the Preview list to the
storage system. If the specified operations complete
successfully, the Preview list will be cleared. If an error
occurs during an operation, the failed operation will remain
in the Preview list. Details about the error (error code and
message) are displayed on the error dialog box. For details
about the list of the error code for XP Snapshot, see the HP
StorageWorks XP24000/XP20000 Remote Web Console
Error Codes.
Cancel button
Cancels all the operations set in the Preview list.
Pool Window
The Pool window allows you to create or delete pools. You can also optimize the V-VOL management
area or the pool management block by using the Pool window. For details, see “Performing XP
Figure 11 Pool Window
The Pool window displays the following items.
56 Using the XP Snapshot GUI
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Table 27 Pool Window Description
Item
Description
Pool Mng. Capacity
The name of the program product that uses pool
management capacity is displayed.
•
used
Indicates the capacity (GB) of the pool management
blocks in use.
•
total
Indicates the maximum possible capacity (GB) of the
pool management blocks, including the capacity of the
pool management blocks in use. The capacity of pool
management blocks is calculated, based on the
assumption that the remaining space of the V-VOL
management area is used as pool management blocks.
If the remaining space of the V-VOL management area
is used for pool association information, the maximum
possible capacity of pool management blocks is
decreased due to decrease in the remaining space of
the V-VOL management area.
You need to keep the capacity of the pool management
blocks in use less than its total capacity.
CAUTION: The value displayed for Total Capacity in
the Pool Information box and the value displayed for
Pool Mng.
Capacity : used are approximately equal, but there may
be some differences. Also note that even if the value
displayed for Total Capacity in the Pool Information box
is updated when the pool-VOLs are added to or deleted
from the pool, the value displayed for Pool Mng.
Capacity : used will not be updated until you click
Apply.
Pool tree
Pools in the disk storage system are displayed in a tree
style. The following icons are displayed in the tree.
The storage system or XP Snapshot or XP Thin Provisioning
Software
•
pool: X: A pool in normal status (X indicates the
pool ID)
•
•
pool: X: A pool whose usage rate exceeds the
threshold (X indicates the pool ID)
pool: X: A blocked pool (X indicates the pool ID)
•
•
: A normal pool (in the process of being deleted)
: A blocked pool (in the process of being deleted)
Menu
When you select an icon in the Pool tree and right-click
the icon, one of the menus in “Menus of the Pool Tree”
(page 63) will be displayed.
Pool Window 57
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Table 27 Pool Window Description (continued)
Item
Description
Pool-VOL list
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Table 27 Pool Window Description (continued)
Item
Description
Information about the pool-VOLs that are registered in the
pool selected in the Pool tree. The following items are
displayed in the list.
•
LDKC:CU:LDEV: LDKC number, CU number, and LDEV
number of the pool-VOL
An LDEV number that ends with a # indicates that the
LDEV is an external volume (for example, 00:00:01#).
An LDEV number that ends with the letter X indicates
that the LDEV is a virtual volume used by XP Thin
Provisioning (for example, 00:00:00X). For details
regarding external volumes, see the HP StorageWorks
XP24000/XP20000 External Storage Software User
Guide. For information about XP Thin Provisioning, see
the HP StorageWorks XP24000/XP20000 Thin
Provisioning Software User Guide.
•
•
•
Capacity: capacity of the pool-VOL
Emulation: emulation type of the pool-VOL
RAID: RAID level (- - - will be displayed in case of an
external volume)
•
Protection: Data protection level
SATA-W/V: Write and Verify method on SATA drives
Standard: FC drives, flash drives, external volumes, or
V-VOLs
HP recommends that the data protection level be the
same for pool-VOLs in the same pool.
•
•
PG: parity group to which the pool-VOL belongs
Encryption: Status of volume encryption
Enable indicates the volume is encrypted.
Disable indicates the volume is not encrypted.
Hyphen (-) appears if the volume is other than internal
volumes.
•
•
Int. VOL Info: drive type of internal volumes. Nothing
will be displayed for FC drives. An asterisk ( * ) will be
displayed for a SATA drive. A dollar sign ( $ ) will be
displayed for an SSD drive. Three consecutive hyphens
(- - -) will display for an external volume.
Pool-VOLs with different drive types cannot be
intermixed in the same pool.
Ext. VOL Info: drive type of external volumes. Nothing
will be displayed for FC drives. An asterisk ( * ) will be
displayed for a SATA or BD drive. A dollar sign ( $ )
will be displayed for an SSD drive. Three consecutive
hyphens (-—) will display for an internal volume.
As a best practice, you should specify the same drive
type for all pool-VOLs registered in the same pool.
•
•
Cache Mode: if the volume is an external volume, cache
mode is displayed. This cache mode is specified when
the external volume is mapped. Pool-VOLs with different
cache modes cannot be intermixed in the same pool.
Total Capacity: total capacity of the pool-VOLs in the
pool
•
•
Used LDEVs: total number of the pool-VOLs in the pool
Remaining LDEVs: total number of the pool-VOLs that
Pool Window 59
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Table 27 Pool Window Description (continued)
Item
Description
you can add to the pool
Add Pool-VOL button
LDKC drop-down list
Adds the selected volume(s) in the Free LDEVs list as pool
VOL(s) to the pool that you selected from the Pool tree.
If you select a CU number from the drop-down list, the
volumes in the CU will be displayed in the Free LDEVs list.
Note that if you select an LDKC from the LDKC drop-down
list, only the CUs in the selected LDKC are displayed.
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Table 27 Pool Window Description (continued)
Item
Description
Free LDEVs list
Among the volumes in the CU which is selected from the
CU drop-down list, the volumes that can be specified as
pool-VOLs will be displayed. The following items are
displayed in the list.
•
LDKC:CU:LDEV: LDKC number, CU number, and LDEV
number of the volume
An LDEV number that ends with a # indicates that the
LDEV is an external volume (for example, 00:00:01#).
An LDEV number that ends with the letter X indicates
that the LDEV is a virtual volume used by XP Thin
Provisioning (for example, 00:00:00X). For details
regarding external volumes, see the HP StorageWorks
XP24000/XP20000 External Storage Software User
Guide. For information about XP Thin Provisioning, see
the HP StorageWorks XP24000/XP20000 Thin
Provisioning Software User Guide.
•
•
•
Capacity: capacity of the volume
Emulation: emulation type of the volume
RAID: RAID level (- - - will be displayed in case of an
external volume)
•
Protection: Data protection level
SATA-W/V: Write and Verify method on SATA drives
Standard: FC drives, flash drives, external volumes, or
V-VOLs
HP recommends that the data protection level be the
same for pool-VOLs in the same pool.
•
•
PG: parity group to which the volume belongs
Encryption: Status of volume encryption
Enable indicates the volume is encrypted.
Disable indicates the volume is not encrypted.
Hyphen (-) appears if the volume is other than internal
volumes.
•
•
•
Int. VOL Info: drive type of internal volumes. Nothing
will be displayed for FC drives. An asterisk ( * ) will be
displayed for a SATA drive. A dollar sign ( $ ) will be
displayed for an SSD drive. Three consecutive hyphens
(- - -) will be displayed for an external volume.
Pool-VOLs with different drive types cannot be
intermixed in the same pool.
Ext. VOL Info: drive type of external volumes. Nothing
will be displayed for FC drives. An asterisk ( * ) will be
displayed for a SATA or BD drive. A dollar sign ( $ )
will be displayed for an SSD drive. Three consecutive
hyphens (- - -) will be displayed for an internal volume.
As a best practice, you should specify the same drive
type for all pool-VOLs registered in the same pool.
Cache Mode: if the volume is an external volume, cache
mode is displayed. This cache mode is specified when
the external volume is mapped. Pool-VOLs with different
cache modes cannot be intermixed in the same pool.
•
•
CLPR: number of the CLPR to which the volume belongs
Selected LDEVs: total number of the volumes that are
selected in the list
Pool Window
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Table 27 Pool Window Description (continued)
Item
Description
Pool Information box
Information about the pool that you selected in the Pool
tree will be displayed. The following items are displayed
in the box.
•
•
Pool ID: number that identifies the pool
Status: status of the pool
◦
◦
Normal: pool is in the normal status
Blocked: pool is blocked
•
•
•
Total Capacity: total capacity of the pool
Used Capacity: used capacity of the pool
Usage Rate: proportion of the used pool capacity to the
total pool capacity (%)
If the usage rate exceeds the threshold, Warning will
be displayed after the usage rate. If the usage rate
reaches 100 %, Error will be displayed after the usage
rate.
• You can set two thresholds for a pool; however, only
one threshold is available for a pool in XP Snapshot.
◦
Threshold 1: Threshold for pool usage rate (%).
Default setting is 80%. Threshold 1 can be changed
from 20% to 95% in 5% increments.
◦
Threshold 2: Because XP Snapshot does not use
Threshold 2, a hyphen (-) will be displayed.
•
•
Attribute: program product that uses the pool
◦
◦
XP Snapshot: XP Snapshot
XP Thin Provisioning: XP Thin Provisioning
CLPR: number of the CLPR to which the pool belongs
Optimize button
If there is no pool in the storage system, this button
optimizes the whole V-VOL management area. If pools
exist in the storage system, this button optimizes the pool
management block in the V-VOL management area.
Optimization of the pool management block needs up to
20 minutes to complete.
If you click this button, all the operations which are
performed in the Pool window before then, but not yet
applied to the storage system, will be canceled.
SIM Complete Request check box
Apply button
Completes the SIMs related to pools. If you select the check
box and click Apply, the SIMs that occur when the usage
rate of a pool exceeds the threshold, or when a pool
becomes blocked, will be completed.
Applies the operations that have been performed in the
Pool window to the storage system. If the specified
operations complete successfully, the contents that have
been displayed in the blue-italic fonts in the Pool tree or
Pool-VOL list will be displayed in normal black fonts.
If an error occurs during the operations, the error code
and error message will be displayed in the error message
box. For a complete list of XP Snapshot error codes, see
the HP StorageWorks XP24000/XP20000 Remote Web
Console Error Codes.
Cancel button
Cancels all the operations that are performed in the Pool
window.
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Table 28 Menus of the Pool Tree
Menu
Function
When you
right-click the XP
Snapshot icon:
New Pool
You can select this menu command only when you right-click the XP
Snapshot icon.
Delete Pool(s)
Restore Pool(s)
Deletes multiple pools at the same time. You can select this menu
command only when the pools that can be deleted exist.
Recovers multiple blocked pools to the normal status at the same time.
You can select this menu command only when the blocked pools exist.
However, note that you cannot select this command when the pool is
blocked because its utilization ratio is 100% (that is, POOL FULL).
When you
right-click the
pool icon:
Change Pool
Information
Opens the Change Pool Information dialog box (“Change Pool
Delete Pool
Restore Pool
Deletes the pool.
Recovers the blocked pool to the normal status. You can select this
menu command only when you right-click the blocked pool icon.
However, note that you cannot select this command when the pool is
blocked because its utilization ratio is 100% (that is, POOL FULL).
V-VOL Window
The V-VOL window allows you to create and delete V-VOLs.
Figure 12 V-VOL Window
When you create V-VOLs in the V-VOL window, you create a V-VOL group and create the V-VOLs
in the group. When you delete V-VOLs, you delete a V-VOL group, including all the V-VOLs in the
group. To add V-VOLs to an existing V-VOL group, or to delete only certain V-VOLs from an existing
V-VOL Window 63
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V-VOL group, use the Virtual LVI/LUN function. To use the Virtual LVI/LUN function, you need a
license for this function. For details about the Virtual LVI/LUN function, see the HP StorageWorks
XP24000/XP20000 Virtual LVI/LUN (VLL) and Volume Shredder User Guide.
The V-VOL window displays the following items.
Table 29 V-VOL Window Items
Item
Description
V-VOL Group – V-VOL tree (the area in the left portion of The V-VOL groups in the disk storage system are displayed
the window)
in the tree style. The following icons are displayed in the
tree.
•
: The storage system or a program product
•
: V-VOL group
•
•
: V-VOL group (in the process of being deleted)
: VDEV
Menu
When you select the icons in the V-VOL group tree and
right-click them, the menus in “Menus of the V-VOL Group
Tree” (page 65) will be displayed.
V-VOL list ( the area in the right of the window)
Information about the V-VOLs that are registered in the
VDEV selected in the V-VOL group tree. The following items
are displayed in the list.
•
LDKC:CU:LDEV: LDKC number, CU number, and LDEV
number of the V-VOL
V-VOLs available for XP Snapshot have the letter V after
their LDEV numbers. V-VOLs which have the letter X after
their LDEV numbers are to be used by XP Thin
Provisioning, so you cannot use them for XP Snapshot
S-VOLs.
Free: indicates free space
•
•
Capacity: capacity of the V-VOL
Emulation: emulation type of the V-VOL
If the emulation type is followed by the word CVS, the
volume is a CV (custom-sized volume). For details about
CV, see the HP StorageWorks XP24000/XP20000
Virtual LVI/LUN (VLL) and Volume Shredder User Guide.
•
Status: status of the V-VOL
◦
◦
Normal
Blocked
•
•
•
CLPR: number of the CLPR to which the V-VOL belongs
Access Attribute: access attribute of the V-VOL
Path: LU path of the V-VOL
Emulation button
Changes the emulation type OPEN-0V of the virtual volume
used by XP Thin Provisioning into OPEN-V. Also, the
contents that have been displayed in blue-italic fonts in the
V-VOL group tree or V-VOL list will be aborted.
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Table 29 V-VOL Window Items (continued)
Item
Description
Apply button
Applies the operations that have been performed in the
V-VOL window to the storage system. If the specified
operations are completed successfully, the contents that
have been displayed in blue italic fonts in the V-VOL group
tree or V-VOL list will be displayed in normal black fonts.
If an error occurs during the operations, the error code
and error message will be displayed in the error message
box. For a complete list of XP Snapshot error codes, see
the HP StorageWorks XP24000/XP20000 Remote Web
Console Error Codes.
Cancel button
Cancels all the operations that are performed in the V-VOL
window.
Table 30 Menus of the V-VOL Group Tree
Command
Function
New V-VOL Group
Opens the New V-VOL Group dialog box (“New V-VOL Group Dialog Box”
program product. To create V-VOLs for XP Snapshot, right-click the XP Snapshot
icon.
Delete V-VOL Group
Deletes the V-VOL group and the V-VOLs that are in that V-VOL group. You can
select this command only when you right-click the V-VOL group icon.
(page 84)). Deletes multiple V-VOL groups and the V-VOLs that are in those V-VOL
groups at the same time. You can select this command when you right-click the XP
Snapshot icon.
V-VOL Window 65
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5 Performing XP Snapshot Operations
This chapter provides instructions for performing XP Snapshot operations.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
When you want to check the result or progress of the operations, or when you want to display the
latest information on the windows, click File and then Refresh on the menu bar of the Remote Web
Console main window.
XP Snapshot Processes
“Using XP Snapshot” (page 67) shows the procedure for using XP Snapshot processes.
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Figure 13 Using XP Snapshot
To create the pools and V-VOLs, you need to use Remote Web Console. To create XP Snapshot
pairs and perform subsequent operations, you need to use the RAID Manager. When deleting
pairs, you can also use Remote Web Console.
•
Before creating a pool, it is required that the virtual volume management area is created in
the shared memory. The virtual volume management area is automatically created when the
additional shared memory is installed. For details on installing additional shared memory,
call HP technical support.
•
If any pools or XP Snapshot pairs are already created for testing purposes before you actually
start using XP Snapshot for production purposes, HP recommends that you optimize the V-VOL
management beforehand.
You do not always need to delete the XP Snapshot pairs after storing snapshot data in the pool.
However, because one P-VOL can be paired with up to 64 S-VOLs, you need to delete the snapshot
data or the pairs that are not necessary. When you delete an XP Snapshot pair, the snapshot data
of the pair will also be deleted from the pool.
If a failure occurred and you restore an XP Snapshot pair, its snapshot data is written back to the
P-VOL. You may not be able to restore the pair if another pair is being restored.
Configuring the Volume List
You can display only the specified volumes in the volume list if you specify the conditions in the
Display Filter dialog box.
To display the Display Filter dialog box:
1. Display XP Business Copy's Pair Operation window.
2. Click Display Filter. The Display Filter dialog box will be displayed.
Configuring the Volume List
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Figure 14 Display Filter Dialog Box (XP Snapshot Tab Selected)
•
•
For details about the XP Business Copy tab of the Display Filter dialog box, see the HP
StorageWorks XP24000/XP20000 Business Copy Software User Guide.
The filter settings are only effective within the current operations in the XP Business Copy's
Pair Operation window. If you start another program product or click a button on the toolbar
on the Remote Web Console main window, the settings will be reset.
If you select the check boxes in the Display Filter dialog box, only the volumes that meet the
condition(s) are allowed to be displayed in the volume list. If you deselect the check boxes, the
volumes that meet the condition(s) will not be displayed in the volume list.
The Display Filter dialog box displays the following items.
•
CLPR drop-down list
Allows you to display the volumes in the specified cache logical partition (CLPR). If you select
All from the drop-down list, the volumes in all the CLPRs will be displayed in the volume list.
•
Volume Type box
The following check boxes are displayed. Both check boxes are selected by default.
◦
◦
Internal VOL: Displays or hides the internal volumes.
External VOL: Displays or hides the external volumes.
•
Attribute box
The following check boxes are displayed.
◦
Reserved: This check box is for XP Business Copy pairs. For details, see the HP
StorageWorks XP24000/XP20000 Business Copy Software User Guide.
◦
◦
◦
Pair: Displays or hides the volumes that form pair(s).
Non-Pair: Displays or hides the volumes in SMPL status.
Cascade (L1 / L2 radio buttons): This check box is for XP Business Copy pairs. For details,
see the HP StorageWorks XP24000/XP20000 Business Copy Software User Guide.
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•
Pair Status box
The following check boxes are displayed.
◦
◦
XP Business Copy: Displays or hides the XP Business Copy pairs.
XP Snapshot: Displays or hides the XP Snapshot pairs.
If the check box is not selected, all the check boxes in each tab will be unavailable.
•
•
XP Business Copy tab
This tab is for XP Business Copy pairs. For details, see the HP StorageWorks
XP24000/XP20000 Business Copy Software User Guide.
XP Snapshot tab
The check boxes that indicate the status of XP Snapshot pairs are displayed. If you select or
deselect the check boxes, the XP Snapshot pairs in those statuses will be displayed or hidden
in the volume list. To use the check boxes in the XP Snapshot tab, you must select the XP
Snapshot check box in the Pair Status box.
•
•
OK button
Applies the settings, and closes the Display Filter dialog box.
Cancel button
Resets the settings, and closes the Display Filter dialog box.
Deleting the Settings in Preview List
The Preview list temporarily retains multiple operations of the same type. The settings in the Preview
list will be reflected in the storage system when you click Apply. If the specified operations complete
successfully, the Preview list will be cleared. If an error occurs during an operation, the failed
operation will remain in the Preview list with an error icon ( ) displayed on the left of the operation
name.
The XP Snapshot settings in the Preview list can be deleted only before clicking Apply. The
procedures for deleting the settings in the Preview list are as follows:
•
•
To delete all of the settings in the Preview list, click Cancel.
To delete only some of the settings in the Preview list:
1. Select and right-click the setting which you want to delete. A menu will be displayed.
2. Select the Deletecommand from the menu.
Only the selected setting will be deleted from the Preview list.
Creating or Deleting Pools
This section describes how to create new pools. Additionally, the procedures for changing the
setting of pools or deleting pools are also described in this section.
Creating New Pools
The required time for creating pools depends on the number and the capacity of the pools and
pool-VOLs which you add to the pool. If you create many pools, or if you add a pool-VOL of large
capacity, it may take about 20 minutes until the processing ends.
To create a new pool:
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1. Change the mode of the Remote Web Console to Modify.
If the mode is already changed to Modify, you can skip this step. For information on how to
change the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console User
Guide.
menu is displayed.
is displayed.
Enter the pool ID in the Pool ID text box.
You can enter only a whole number from 0 to 127 in this text box. Do not enter any number
that is already used for another pool.
Select the threshold of the pool usage rate from the Threshold drop-down list.
CAUTION: If the usage rate of the pool exceeds the threshold, you cannot create new XP
Snapshot pairs. Make sure you do not set too small a value for the threshold.
4. Check the contents of the setting and if there is no problem, click Set. The New Pool dialog
box closes and the new pool will be displayed in the Pool tree.
5. Select the pool in the Pool tree.
6. Select the volumes which you want to register in the pool as the pool-VOLs from the Free LDEVs
list.
•
If you select the CU number from the CU drop-down list, the volumes in the CU will be
displayed in the list. Within the same CU, you can select multiple volumes at the same
time.
•
•
If you select an LDKC from the LDKC drop-down list, only the CUs in the selected LDKC
are displayed in the CU drop-down list.
select an external volume.
7. Click Add Pool-VOL.
If you select and right-click the volume in the Free LDEVs list, a pop-up menu will be displayed.
If you select the Add Pool-VOLcommand from the pop-up menu, the result will be the same
as when you click Add Pool-VOL.
8. Check the list of the volumes on the dialog box, and, if there is no problem, click OK. The
dialog box closes and the selected volumes will be displayed in the Pool-VOL list.
•
The total capacity of the pool-VOLs in the pool is the storage capacity of the pool. See “
Notes on Defining Pool Capacity” (page 40) for notes on creating a pool.
•
The capacity of the pool management blocks in use will increase if you add the pool-VOLs.
You need to be careful to keep the capacity of the pool management blocks in use to less
than its total capacity.
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A confirmation message is displayed asking if it is OK to apply the setting to the storage
system.
CAUTION: You cannot delete the pool-VOLs after you add them. So, make sure that the
settings of the pool-VOLs you are going to add are right.
11. Click OK.
The confirmation message closes and the new pool information is applied to the storage
system.
Figure 15 New Pool Dialog Box
The New Pool dialog box displays the following items.
•
Pool ID text box
You can enter the pool ID in the text box. A whole number from 0 to 127 can be entered in
the text box.
Do not enter a pool ID that is already used by another pool. If you enter a pool ID that is
already used by another pool and click Set, an error message will be displayed. In that case,
enter a different number for the new pool ID.
•
Threshold drop-down list
You can select the threshold of the pool usage rate between 20 and 95.
The unit of the threshold is percent ( % ). If the pool usage rate exceeds the threshold, the pool
status changes to Warning. You cannot create new XP Snapshot pairs if the pool is in Warning
status. Be careful not to set a very small value for the threshold.
•
•
•
Attribute drop-down list
The program product that uses the pool is displayed. You cannot select the items from this
drop-down list.
Set button
Creates a new pool according to the settings in the New Pool dialog box and closes the dialog
box.
Cancel button
Cancels the settings in the New Pool dialog box and closes the dialog box. No pool will be
created.
Changing the Information for the Pools
After you create a pool, the only setting you can change is the threshold.
Creating or Deleting Pools
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To change the threshold of the pool:
1. Change the mode of the Remote Web Console to Modify.
If the mode is already changed to Modify, you can skip this step. For information on how to
change the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console User
Guide.
2. Select and right-click the pool whose setting you want to change in the Pool tree of the Pool
window. A menu appears. If the pool usage rate is 95% or higher, the menu will not be
displayed.
3. Select the Change Pool Informationcommand from the menu. The Change Pool
4. Select the value for the threshold from the Threshold drop-down list.
In the drop-down list, only the values that are higher than the pool usage rate are displayed.
5. Click OK.
The Change Pool Information dialog box closes.
6. Click Apply.
The confirmation message indicating if it is OK to apply the setting to the storage system is
displayed.
7. Click OK.
The confirmation message closes and the change of the setting is applied to the subsystem.
Figure 16 Change Pool Information Dialog Box
The items in the Change Pool Information dialog box are the same as those of the New Pool dialog
box. However, in the Change Pool Information dialog box, you cannot enter or select items other
than the Threshold drop-down list.
Deleting Pools
Usually, you specify one pool and delete only the specified pool. However, you may delete multiple
pools at the same time, if necessary. This section describes the procedures for when you delete
one specified pool and when you delete multiple pools at the same time.
Deleting a Pool
To delete a pool:
1. Change the mode of the Remote Web Console to Modify.
If the mode is already changed to Modify, you can skip this step. For information on how to
change the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console User
Guide.
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2. Select and right-click the pool you want to delete in the Pool tree of the Pool window. A menu
is displayed. If the amount of the pool capacity that is used is other than zero (0) GB, the
menu will not be displayed.
3. Select the Delete Poolcommand from the menu. A confirmation message is displayed
asking if it is OK to delete the selected pool.
4. Click OK. The icon of the selected pool changes to the icon which indicates the deleting
process.
5. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
6. Click OK. The confirmation message closes, and the deletion of the pool is applied to the
storage system.
Deleting Multiple Pools
CAUTION: If you execute the following operation, all the pools that can be deleted will be deleted.
If there is any pool that you do not want to delete, you must delete one pool at a time by following
To delete multiple pools:
1. Change the mode of the Remote Web Console to Modify.
If the mode is already changed to Modify, you can skip this step. For information about how
to change the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console
User Guide.
2. Select and right-click the XP Snapshot icon in the Pool tree of the Pool window. A menu is
displayed.
3. Select the Delete Pool(s)command from the menu. A confirmation message is displayed
asking if it is OK to delete the pools.
4. Click OK. The icons of the pools change to indicate the pools that are being deleted.
5. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
6. Click OK. The confirmation message closes and the deletion of the pools is applied to the
subsystem.
Optimizing the V-VOL Management Area or Pool Management Block
This section describes how to optimize the whole V-VOL management area or the pool management
block in the V-VOL management area.
Optimizing the V-VOL Management Area
By optimizing the whole V-VOL management area, the V-VOL management area can be used much
more efficiently. Therefore, you will be able to create a pool whose capacity is larger than before
optimizing, or you will be able to create more pools compared to before the optimization.
You need to delete all pools in the storage system before optimizing the V-VOL management area.
If pools exist in the storage system, only the pool management block will be optimized instead of
the whole V-VOL management area.
To optimize the V-VOL management area:
1. Change the mode of the Remote Web Console to Modify.
If the mode is already changed to Modify, you can skip this step. For information on how to
change the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console User
Guide.
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2. Click Optimize in the Pool window.
A confirmation message is displayed asking if it is OK to optimize the V-VOL management
area or the pool management block.
3. Click OK.
A confirmation message is displayed asking if it is OK to cancel all the operations performed
in the Pool window.
4. Click OK.
The confirmation message indicating if it is OK to apply the setting to the storage system and
perform the initialization is displayed.
5. Click OK.
The optimization of the V-VOL management area or the pool management block is performed.
Optimizing the Pool Management Block
If you optimize the pool management block, I/O performance of the pool will improve compared
to before optimization. You can optimize the pool management block without changing the pools
already created in the storage system.
The procedure for optimizing the pool management block is the same as the procedure for
optimizing the V-VOL management area. Therefore, follow the instructions in “Optimizing the
V-VOL Management Area” (page 73) to optimize the pool management block.
You may need up to 20 minutes to optimize the pool management block.
Creating or Deleting Virtual Volumes
This section describes how to create new V-VOLs. In addition, the procedures for deleting pools
are also described in this section.
Creating New Virtual Volumes
To create new virtual volumes:
1. Change the mode of the Remote Web Console to Modify.
If the mode is already changed to Modify, you can skip this step. For information on changing
the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console User Guide.
2. Right-click XP Snapshot in the V-VOL group tree of the V-VOL dialog box. A menu is displayed.
3. Select the New V-VOL Groupcommand from the menu. The New V-VOL Group dialog box
4. Select or enter the V-VOL group ID in the V-VOL Group drop-down list.
You can enter only a whole number from 1 to 65536. Do not enter a number that is already
used for another V-VOL group.
5. Select the emulation type of the V-VOL group from the Emulation Type drop-down list.
6. Select the CLPR number of the CLPR in which you want to register the V-VOL group from the
CLPR drop-down list.
7. Enter the number of the V-VOL group in the Copy of V-VOL Groups text box.
•
You can enter only a whole number from 0 to 63231 in the Copy of V-VOL Groups text
box. However, when the external volume groups of XP External Storage or the V-VOL
groups of XP Thin Provisioning are created, the available V-VOL groups for XP Snapshot
will be fewer than the maximum number according to the number of the external volume
groups and V-VOL groups of XP Thin Provisioning. For example, if 10 external volume
74
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groups are created for XP External Storage, you can enter only a whole number under
63221.
•
If you create multiple V-VOL groups at the same time, all V-VOLs that are going to be
registered in each V-VOL group will have the same emulation type and capacity.
(page 77)) is displayed.
9. Select the emulation type of the V-VOL from the Emulation Type drop-down list.
10. Select the unit of the capacity of the V-VOL from the Capacity Unit drop-down list. The selected
unit is displayed after the Capacity text box.
11. Enter the capacity of the V-VOL in the Capacity text box.
•
•
•
If the unit is megabytes (MB), you can enter only a whole number from 46 to 4194303.
If the unit is blocks, enter a whole number from 96000 to 8589934592. If the unit is
cylinders, enter a whole number from 50 to 4473924.
The V-VOLs you are creating will be used when you specify the S-VOLs of the XP Snapshot
pairs. Because the capacity of the P-VOL and the S-VOL of the XP Snapshot pair must be
equal, consider the capacity of the P-VOLs when you decide the V-VOL capacity.
When you specify the Capacity Unit as MB or Cyl, the storage system adjusts the capacity
to an optimal value. Therefore, when you want to set the capacity accurately to the largest
possible V-VOL capacity, specify the Capacity Unit as block.
12. Enter the number of the V-VOLs you want to create in the Number of V-VOL text box.
You can enter only a whole number from 1 to 1024 in this text box.
13. Click Set. The volumes are added to the V-VOL information setting list (middle of the dialog
By using XP Snapshot, you cannot add new V-VOLs to the V-VOL group when you complete
the operations to create the V-VOLs. Make sure to add enough V-VOLs to create the XP Snapshot
pairs at this point.
(page 79)) is displayed.
15. Select the volume in the V-VOL information setting list (upper right area of the dialog box).
16. Select the LDKC number from the Select LDKC No. drop-down list, and select the CU number
from the Select CU No. drop-down list. Areas of the CU selected from the drop-down list are
displayed in the Select LDEV No. area (middle of the dialog box).
•
Only the areas displayed by the white cells are available for the V-VOLs. You cannot use
the areas displayed by the gray cells to create the V-VOLs.
•
To select the CUs that belong to other SLPRs, select the CU number of another SLPR is
used check box.
17. Select the interval between the LDEV numbers from the Interval drop-down list.
If you select 0, the LDEV number will be sequential.
18. Select the area in the Select LDEV No. area. The color of the selected area changes to blue.
The CU number and LDEV number are added to the V-VOL information setting list, and the
blue italic fonts change to black normal fonts. If there are multiple V-VOLs to set, repeat Step
(page 82)) is displayed.
20. Check the settings and, if there is no problem, click OK. The Create V-VOL wizard dialog box
(3) closes and the V-VOL window is displayed again. In the V-VOL window, the settings are
displayed in the blue italic fonts.
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21. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
22. Click OK. The confirmation message closes and the new V-VOL information is applied to the
subsystem.
Figure 17 New V-VOL Group Dialog Box
The New V-VOL Group dialog box displays the following items.
•
V-VOL Group drop-down list
You can select or enter the V-VOL group ID in the drop-down list. A whole number from 1 to
65536 can be selected or entered in the drop-down list.
Do not enter a V-VOL group ID that is already used by another V-VOL group. If you enter a
V-VOL group ID that is already used by another V-VOL group and click Next, an error message
will be displayed. In that case, select or enter a different number for the new V-VOL group ID.
•
•
•
Emulation Type drop-down list
You can select the emulation type of the V-VOL group.
CLPR drop-down list
You can select the CLPR of the V-VOL group.
Attribute
The name of the program product that is going to use the V-VOL group is displayed. This is
the name of the program product whose icon you right-clicked in order to display the New
V-VOL Group dialog box.
•
•
•
Copy of V-VOL Groups text box
The number of the V-VOL groups to be copied can be entered. You can enter a whole number
from 0 to 63231. Note that no V-VOL group will be copied if you enter 0.
Next button
Fixes the settings in the New V-VOL Group dialog box and displays the Create V-VOL wizard
dialog box (1).
Cancel button
Cancels the settings in the New V-VOL Group dialog box and closes the dialog box.
76
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Figure 18 Create V-VOL Wizard Dialog Box (1)
The Create V-VOL wizard dialog box (1) displays the following items.
•
•
•
•
V-VOL Group
V-VOL group ID that you set in the New V-VOL Group dialog box is displayed.
Emulation Type drop-down list
You can select the emulation type of the V-VOL.
Capacity Unit drop-down list
You can select the unit of the capacity of the V-VOL: MB (megabyte), block, or Cyl.
Capacity text box
You can enter the capacity of the V-VOL in the text box. If you selected MB from the Capacity
Unit drop-down list, you can enter a whole number from 46 to 4194303. If you selected block
from the drop-down list, you can enter a whole number from 96000 to 8589934592. If you
selected Cyl from the Capacity Unit drop-down list, you can enter a whole number from 50 to
4473924.
When you specify the Capacity Unit as MB or Cyl, the storage system adjusts the capacity to
an optimal value. Therefore when you want to set the capacity accurately to the largest possible
V-VOL capacity, specify the Capacity Unit as block
•
Number of V-VOL text box
You can enter the number of the V-VOLs that you want to add in the text box. Enter a whole
number from 1 to 1024.
The number of V-VOLs that you can enter changes by the number of V-VOL groups to be copied
For example, when the number of available V-VOLs is 1024, and you enter 100 in the Copy
of V-VOL Groups text box in the New V-VOL Group dialog box, you can specify up to 10
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V-VOLs per V-VOL group. In this case, (1 - 10) is displayed on the right of the Number of
V-VOL text box.
•
•
•
Set button
Adds the V-VOL(s) to the V-VOL information setting list.
Delete button
Deletes the selected V-VOL(s) from the V-VOL information setting list.
V-VOL information setting list (for example, middle of the dialog box)
Information about the V-VOL(s) that you are going to create is displayed.
◦
◦
◦
No.: number
Emulation: emulation type of the V-VOL
Capacity: capacity of the V-VOL
•
•
•
Back button
Returns to the New V-VOL Group dialog box while maintaining the settings in this dialog box.
Next button
Confirms the setting in this dialog box and moves to the Create V-VOL wizard dialog box (2).
Cancel button
Cancels the setting in the Create V-VOL wizard dialog box (1) and closes the dialog box.
78
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Figure 19 Create V-VOL Wizard Dialog Box (2)
The Create V-VOL wizard dialog box (2) displays the following items.
•
V-VOL information setting list (upper right area of the dialog box)
Information about the V-VOL(s) that you are going to create is displayed.
◦
◦
◦
◦
◦
No.: number
V-VOL Group: V-VOL group ID
Emulation: emulation type of the V-VOL
Capacity: capacity of the V-VOL
LDKC:CU:LDEV: LDKC number, CU number, and LDEV number of the V-VOL
•
•
•
Select LDKC No. drop-down list
You can select the LDKC number.
Select CU No. drop-down list
You can select the CU number.
Interval drop-down list
You can select the interval between the LDEV numbers that need to be assigned to the newly
created V-VOLs. If you select 0, the LDEV numbers will be sequential.
◦
The value you specify as the interval between LDEV numbers counts only the available
LDEV numbers and skips those that are not selectable.
◦
Even when you use the multiple CUs, LDEV numbers will be assigned according to the
setting in the Interval drop-down list.
•
Select LDEV No. area
Among the CUs which belong to the LDKC you selected in the Select LDKC No. drop-down
list, the settings of LDEV numbers for the CU number selected from the Select CU No. drop-down
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list are displayed. Numbers in the upper end and the left side indicate the LDEV number. For
example, the LDEV number of the cell whose upper end is +2 and left side is +10 is 12.
Gray cells indicate the LDEV numbers that are already used for other volumes, white cells
indicate the unused LDEV numbers, and blue cells indicate the LDEV numbers that are selected
for the V-VOLs in this dialog box.
•
•
CU number of another SLPR is used check box
Allows you to select the CU numbers of the SLPR other than the SLPR now you are in.
Back button
Returns to the Create V-VOL wizard dialog box (1) while maintaining the settings in this dialog
box.
•
•
Next button
Fixes the setting in this dialog box and moves to the Create V-VOL wizard dialog box (3).
The Create V-VOL dialog box (3) appears only when SSID is not assigned to the boundary
area that contains LDEV numbers you set in this dialog box. The Create V-VOL dialog box (4)
appears when SSID is assigned.
Cancel button
Cancels the setting in the Create V-VOL wizard dialog box (2) and closes the dialog box.
Figure 20 Create V-VOL Wizard Dialog Box (3)
•
SSID tree
Shows the LDKC numbers, CU numbers, SSID boundary and SSID in a hierarchical tree
structure.
The boundary area is a collection of LDEV numbers to which the SSID is assigned. For example,
using the boundary area 00-FF, assign an SSID between LDEV numbers 00 to FF. A CU
contains one or four boundary areas, which are fixed for each CU with factory settings.
An SSID in parentheses is shown at the right of the boundary area (left column on screen).
When an SSID is not assigned to the boundary area, an exclamation mark is added to the
LDKC number, CU number or boundary area icon, and an "- - -" appears to the right of the
boundary area.
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◦
: LDKC number or CU number. Indicates that SSID is assigned to the all boundary
areas.
◦
◦
: LDKC number or CU number. Indicates the boundary area with no SSID.
: Indicates that no SSID is assigned to the boundary area.
•
Set SSID list
Assigns SSID to the boundary area that contains LDEV numbers you set in this dialog box.
Information about the Set SSID list:
◦
◦
◦
◦
LDKC: LDKC number of CU number where SSID is not assigned.
CU: CU number where SSID is not assigned.
LDEV boundary: Boundary area of LDEV number where SSID is not assigned.
SSID: Assigned SSID. The initial value is blank.
•
•
Input SSID list
Select or enter the SSID you want. You must be logged in as storage administrator to enter
an SSID.
Set
◦
◦
Input SSID: Sets the SSID you select or input from the Input SSID list.
Set SSID: Updates the SSID you select or input from the Input SSID list.
•
SSID number of another SLPR is used
When the SSID number of another SLPR is used check box is checked, you can enter the SSID
except for an SLPR that contains a parity group of your operation in the Input SSID list. When
the check box is not checked, you can only select the SSID of the SLPR that contains a parity
group of your operation.
SSID number of another SLPR is used appears only when you are logged in as a storage
administrator and more than two SLPRs exist. When the check box is not checked, Input SSID
is not accessible.
•
Back
Maintains the settings in this dialog box while returning you to the Create V-VOL dialog box
(2).
•
•
Next
Implements the settings in this dialog box and opens the Create V-VOL dialog box (4).
Cancel
Cancels the operation and closes the dialog box.
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Figure 21 Create V-VOL Wizard Dialog Box (4)
The Create V-VOL wizard dialog box (4) displays the following items.
•
V-VOL Group drop-down list
You can select the V-VOL group number of the V-VOL you set. Note that you cannot enter the
number.
•
V-VOL information setting list (middle of the dialog box)
Information about the V-VOL(s) whose V-VOL number you selected from the V-VOL Group
drop-down list is displayed.
◦
◦
◦
◦
VDEV: V-VOL group number and VDEV number
Emulation: emulation type of the V-VOL
Capacity: capacity of the V-VOL
LDKC:CU:LDEV: LDKC number, CU number, and LDEV number of the V-VOL
•
Back button
Returns to the Create V-VOL wizard dialog box (2) while maintaining the settings in this dialog
box.
•
•
OK button
Fixes the setting in the Create V-VOL wizard dialog box (3) and closes the dialog box.
Cancel button
Cancels the setting in the Create V-VOL wizard dialog box (3) and closes the dialog box.
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Deleting Virtual Volumes and a Virtual Volume Group
To delete V-VOL(s) and a V-VOL group:
1. Change the mode of the Remote Web Console to Modify. If the mode is already changed to
Modify, you can skip this step. For information on how to change the mode, see the HP
StorageWorks XP24000/XP20000 Remote Web Console User Guide.
2. In the V-VOL group tree in the V-VOL window, select and right-click the V-VOL group which
contains the V-VOL(s) you want to delete. A menu is displayed.
3. Select the Delete V-VOL Groupcommand from the menu. A confirmation message is
displayed asking if it is OK to delete the selected V-VOL group.
4. Click OK. The icon of the selected V-VOL group changes to the icon which indicates the
deleting process.
5. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
6. Click OK. The confirmation message closes and the deletion of the V-VOL group is applied to
the subsystem.
CAUTION: You cannot delete the V-VOL and its V-VOL group if the V-VOL is used as the S-VOL
of the XP Snapshot pair. To delete the V-VOL that is used as the S-VOL and its V-VOL group, first
you need to delete that pair.
Deleting Multiple Virtual Volume Groups
To delete V-VOL(s) and multiple V-VOL groups:
CAUTION: You cannot delete the V-VOLs and their V-VOL groups if the V-VOLs are used as the
S-VOLs of the XP Snapshot pairs. To delete the V-VOLs that are used as the S-VOLs and their V-VOL
groups, first you need to delete XP Snapshot pairs.
To delete V-VOLs and V-VOL groups:
1. Change the mode of the Remote Web Console to Modify. If the mode is already changed to
Modify, you can skip this step. For information on how to change the mode, see the HP
StorageWorks XP24000/XP20000 Remote Web Console User Guide.
2. Right-click the XP Snapshot in the V-VOL group tree of the V-VOL window. A menu is displayed.
3. Select the Delete V-VOL Groupscommand from the menu. The Delete V-VOL Groups
Depending on your environment, it may take approximately 30 seconds to open the Delete
V-VOL Groups dialog box.
4. In the V-VOL group's information setting list in the Delete V-VOL Groups dialog box, select the
V-VOL groups you want to delete. Specify a relevant CLPR from the CLPR drop-down list, and
the list of V-VOL groups that are included in the CLPR is displayed in the V-VOL group's
information setting list. To locate the V-VOL groups you want to delete, click the button in the
page area under the list and display the page which includes the V-VOL groups that you want
to delete.
The list displays a maximum of 4,096 V-VOL groups at a time. If the number of V-VOL groups
exceeds 4,096, the Previous and Next buttons allow you to display the remaining V-VOL
groups.
5. Click Set. The specified V-VOL groups are displayed in blue italic font. Click the Clear button
to clear the specified V-VOL groups. To specify more V-VOL groups, repeat step 4 to step 5.
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6. Click OK. The Delete V-VOL Groups dialog box closes. A confirmation message indicating if
it is OK to apply the setting to the storage system is displayed.
7. Click OK. The confirmation message closes and the deletion of the V-VOL groups is applied
to the subsystem. If you click the Cancel button in this message, the Delete V-VOL Groups
dialog box is displayed again. If the specified V-VOL groups are not deleted, a dialog box
is displayed.
Figure 22 Delete V-VOL Groups Dialog Box
The Delete V-VOL Groups dialog box displays the following items.
•
Attribute
The name of the program product that is going to use the V-VOL groups is displayed. This is
the name of the program product whose icon you right-clicked to display the Delete V-VOL
Groups dialog box.
•
•
CLPR drop-down list
You can select the CLPR of the V-VOL group. If All is selected, all V-VOL groups in all CLPRs
are displayed.
V-VOL information setting list (for example, the central portion of the dialog box)
Information about the V-VOL groups that you are going to delete is displayed.
◦
◦
◦
V-VOL Group: V-VOL group ID
CLPR: the number of the CLPR
V-VOL Cnt: the number of the V-VOLs in the V-VOL groups
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•
•
Icons
The following icons are displayed in the dialog box.
◦
◦
V-VOL group
V-VOL group (in the process of being deleted)
The Page area displays the number of the current page and the following items are used to
change pages of the list.
◦
◦
Previous button allows you to display the previous 4,096 V-VOL groups.
N/M drop-down list: The N displays the number of the current page. The M displays total
number of pages. You can click the drop-down list, and choose the number of the page
you want to display.
◦
Next button allows you to display the next 4,096 V-VOL groups.
•
Set button specifies that the V-VOL groups selected in the V-VOL information setting list will be
deleted. The V-VOL groups to be deleted are displayed as blue-italic fonts.
•
•
Clear button clears each setting in the V-VOL information setting list.
OK button closes the Delete V-VOL Groups dialog box. A confirmation message indicating if
it is OK to apply the setting to the storage system is displayed.
•
Cancel button cancels all the settings in the Delete V-VOL Groups dialog box.
Creating XP Snapshot Pairs
Use the paircreatecommand of the RAID Manager to create XP Snapshot pairs. To create XP
Snapshot pairs, the following are required.
•
•
•
•
Specify the same size volumes as a P-VOL and S-VOL
When you use a volume that is already used as the P-VOL of another pair for the P-VOL of
the new pair, specify the same pool for the pairs which share the P-VOL
For details about the paircreatecommand, see the HP StorageWorks XP RAID Manager User
Guide.
Storing XP Snapshot Data
Use the pairsplitcommand of the RAID Manager to store snapshot data in the pool. You can
store 64 snapshot data at most per P-VOL. To store snapshot data, the pair status must be PAIR.
When a P-VOL is paired with two or more volumes, make sure that none of the pairs is in
COPY(RS-R) status. If some pairs are in the COPY(RS-R) status, the pairsplitcommand may end
abnormally.
During execution of the pairsplitcommand to the XP Snapshot pair, do not execute the
pairresync -restorecommand to the other XP Snapshot pair that shares P-VOL with the
corresponding pair. The pairsplitcommand being executed may end abnormally. Possible
causes are as follows:
•
•
•
Command rejection
Timeout (Error code: EX_EWSTOT)
Suspending the pair (Error code: EX_EWSUSE)
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You can store one snapshot data at a time by using the pairsplitcommand, but you cannot
specify the snapshot data ID. For details about the pairsplitcommand, see the HP StorageWorks
XP RAID Manager User Guide.
XP Snapshot does not support Quick Split mode. If you specify Quick Split mode, snapshot data
will not be stored in the pool, even if the command ends normally. Therefore, even if you specify
Quick Split mode, Quick Split mode does not take effect.
Storing XP Snapshot Data by Consistency Group with At-Time Snapshot
Function
With RAID Manager, you can store snapshot data by a consistency group (At-Time Snapshot
function).
Consistency groups have the following restrictions:
Table 31 Specifications of Consistency Group
Items
Descriptions
Consistency group number
A number is assigned to each consistency group within a
range of 0 to 255. You can specify a consistency group
number when you create XP Snapshot pairs. If you do not
specify a number, an unused number is assigned
automatically. Use the Volume List of the XP Snapshot
window or Pair Operation window of XP Business Copy
Software to view the list of the consistency group numbers.
You can configure up to 256 consistency groups in a
storage system, including XP Business Copy consistency
groups and Hitachi ShadowImage for Mainframe
consistency groups.
Number of pairs
You can define up to 8,192 XP Snapshot pairs in a
consistency group.
XP Business Copy Software pairs, Hitachi ShadowImage™
for Mainframe, and XP Snapshot pairs cannot coexist in
the same consistency group.
A summary of the steps to store snapshot data using the At-Time Snapshot function of RAID Manager
is listed below. For details about the steps, see the HP StorageWorks XP RAID Manager User
Guide.
1. Execute the paircreatecommand with specifying the consistency group number.
The XP Snapshot pair that is the target of the At-Time Snapshot function is created.
The XP Snapshot function is enabled automatically by specifying the consistency group number.
2. Execute the paircreatecommand again by specifying the same consistency group number
specified in step 1.
You can add pairs into the same consistency group. Repeat this step for each number of pairs
that you want to specify into the same consistency group.
3. Execute the pairsplitcommand to the consistency group that is a target of the At-Time
Snapshot function.
After the XP24000/XP20000 Disk Array accepts the pairsplitcommand, the snapshot
data of the P-VOL will be stored at the time when the host issues an I/O request to each P-VOL
in the corresponding consistency group.
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Consistency group:
•
You cannot specify the XP Snapshot pairs in the same consistency group if the pairs share
the same volume as P-VOL. If you specify these pairs in the same consistency group, the
paircreatecommand will be rejected.
•
You should not mix pairs created with the At-Time Snapshot option and without the At-Time
Snapshot option in the same group as the group which is defined in the RAID Manager
configuration file. This group differs from the consistency group. If you mix these two
types of pairs, the pairsplitcommand may terminate abnormally. Additionally, it is
not recommended that the stored snapshot data is the P-VOL data at the time when the
XP 24000/20000 Disk Array accepts the pairsplitcommand.
•
You can specify only 1 consistency group for each group that is defined in the RAID
Manager configuration file.
When you create a pair by using the group that is defined in the RAID Manager
configuration file, if some pairs specifying consistency group has been created in the
group already, you should create a pair by specifying the same consistency group as
the corresponding pairs. Even if you try to create a pair by specifying the other consistency
group, the pair will be added to the same consistency group as the corresponding pairs.
If you want to specify plural consistency groups, define as many groups as the consistency
groups that you want to specify in the RAID Manager configuration file.
•
Cautions for storing snapshot data:
When the pairsplitcommand is issued, if the corresponding consistency group includes
the pairs that are not in the PAIR status, the pairsplitcommand processing may
terminate abnormally.
The causes of abnormal end are as follows:
◦
◦
◦
Command rejection
Timeout (Error code: EX_EWSTOT)
Suspending the pair (Error code: EX_EWSUSE)
While executing the pairsplitcommand, if the other operation (deletion of snapshot
data or deletion of XP Snapshot pairs, etc.) is executed to the pairs in the corresponding
consistency group, the consistency of the stored snapshot data cannot be ensured.
Therefore, the pairsplitcommand processing may terminate abnormally.
The causes of abnormal end are as follows:
◦
◦
◦
Command rejection
Timeout (Error code: EX_EWSTOT)
Suspending the pair (Error code: EX_EWSUSE)
The restoration of the XP Snapshot pair sometimes ends abnormally for any of the following
reasons:
◦
The snapshot data of the XP Snapshot pair for restoration is being stored per
consistency group.
◦
The P-VOL of the XP Snapshot pair for restoration is used as the P-VOL of another XP
Snapshot pair, and the snapshot data of the latter XP Snapshot pair is being stored
per consistency group.
•
Caution for when the host server is down or has failed:
When the host server is down or has failed, a consistency group without any XP Snapshot
pairs may be created. If you create pairs that are the target of the At-Time Split option
from XP RAID Manager under such a condition, the command might be rejected. In this
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case, find the consistency group number by sorting the CTG column on the XP Snapshot
window or Pair Operation window of XP Business Copy, and create a pair specifying
the consistency group number intentionally.
•
Caution for when the XP Snapshot pair P-VOL is shared with an XP Continuous Access
Software pair or an XP Continuous Access Journal Software pair:
If the status of some XP Snapshot pairs belonging to a consistency group cannot be
changed, the pairsplitcommand processing by RAID Manager might terminate
abnormally with the error code EX_EWSTOT. This error indicates that a timeout has
occurred. Probable reasons why the pair status cannot be changed are as follows:
◦
When an XP Continuous Access Journal S-VOL is used as an XP Snapshot P-VOL,
the capacity of the journal volumes for this XP Continuous Access Journal pair is
insufficient.
◦
◦
◦
The XP Snapshot license is invalid.
Volumes of the XP Snapshot pair are blocked.
The XP Snapshot pair is in the status where the pairsplitcommand cannot be
◦
The XP Continuous Access pair or XP Continuous Access Journal pair is in the status
After these factors are removed, resynchronize a pair, and execute the pairsplit
command again.
Restoring XP Snapshot Pairs
Use the pairresync -restorecommand of the RAID Manager to restore XP Snapshot pairs.
The XP Snapshot pair must be in PSUS status when you restore the pair.
When the restoration completes, the pair status changes to PAIR. For details about the pairresync
-restorecommand, see the HP StorageWorks XP RAID Manager User Guide.
CAUTION: If a failure occurs during the restoration, the pair status changes to PSUE. To recover
the PSUE pair, you need to delete the snapshot data of the pair. When you recover the PSUE pair
by deleting its snapshot data, data in the P-VOL will not be ensured. Therefore, you need to overwrite
the P-VOL with the backup data or format the P-VOL.
XP Snapshot does not support Quick Restore mode. If you specify Quick Restore mode, XP Snapshot
pair will not be restored even if the command ends normally. Therefore, even if you specify Quick
Resync mode, Quick Resync mode does not take effect.
Deleting XP Snapshot Data
Use the pairresynccommand of the RAID Manager to delete snapshot data. You can store up
to 64 snapshot data per P-VOL. Therefore, to store the new snapshot data in a P-VOL that already
has 64 snapshot data, you need to delete the old snapshot data.
If you delete snapshot data, free area in the pool will increase. To increase the free area in the
pool, delete snapshot data by issuing the pairresynccommand on the XP Snapshot pairs in
PSUS status. However, if the snapshot data you try to delete shares a data area with other snapshot
data, only the snapshot ID will be deleted and the data itself will not be deleted from the pool.
For details about the pairresynccommand, see the HP StorageWorks XP RAID Manager User
Guide.
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XP Snapshot does not support Quick Resync mode. If you specify Quick Resync mode, snapshot
data will not be deleted even if the command ends normally. Therefore, even if you specify Quick
Resync mode, Quick Resync mode does not take effect.
Deleting XP Snapshot Pairs
Use the command of the RAID Manager or the Pairsplit-S dialog box to delete XP Snapshot pairs.
If you use the RAID Manager to delete XP Snapshot pairs, you need to use the pairsplit -S
command. By using this command, you can delete only one pair at a time. For details about the
pairsplit -Scommand, see the HP StorageWorks XP RAID Manager User Guide.
If you use the Pairsplit-S dialog box, you can delete multiple pairs at the same time. You can open
the Pairsplit-S dialog box either from XP Business Copy's Pair Operation window or the XP Snapshot
window. To select the pairs to be deleted by the port or host group, open the Pairsplit-S dialog
box from the Pair Operation window. To select the pairs by pool, open the Pairsplit-S dialog box
from the XP Snapshot window.
Deleting XP Snapshot Pairs by Selecting the Pairs per Port
To delete XP Snapshot pairs by selecting the pairs per port:
1. Change the mode of the Remote Web Console to Modify. If the mode is already changed to
Modify, you can skip this step. For information on how to change the mode, see the HP
StorageWorks XP24000/XP20000 Remote Web Console User Guide.
2. Display the Pair Operation window.
3. In the tree, select the port or host group that contains the XP Snapshot pairs you want to delete.
The list of the pairs or volumes is displayed in the volume list.
4. Select and right-click the XP Snapshot pairs you want to delete. A menu is displayed.
You cannot delete an XP Business Copy pair and an XP Snapshot pair at the same time.
Dialog Box” (page 90)) is displayed.
6. Click OK. The Pairsplit-S dialog box closes and a list of the XP Snapshot pairs that you are
going to delete is displayed in the Preview list of the Pair Operation window.
7. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
8. Click OK. The confirmation message closes and the deletion of the pair is applied to the
storage system.
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Figure 23 Pairsplit-S Dialog Box
When you select an XP Snapshot pair and display the Pairsplit-S dialog box, the dialog box displays
the following items.
•
Volume list
Information about the XP Snapshot pairs you are going to delete is displayed.
◦
P-VOL: Information about the P-VOL is displayed in AAA-BB-CCC(XX:YY:ZZ) format.
–
–
–
–
AAA: The port ID (cluster and channel number)
BB: The group number of the host group
CCC: LU number
XX:YY:ZZ: LDKC number:CU number:LDEV number
An LDEV number that ends with a # indicates that the LDEV is an external volume (for
example, 00:00:01#). An LDEV number that ends with the letter X indicates that the LDEV
is a virtual volume used by XP Thin Provisioning (for example, 00:00:00X). For details
regarding external volumes, see the HP StorageWorks XP24000/XP20000 External
Storage Software User Guide. For information about XP Thin Provisioning, see the HP
StorageWorks XP24000/XP20000 Thin Provisioning Software User Guide.
◦
◦
◦
MU: snapshot ID
Status: status of the XP Snapshot pair
S-VOL: Information about the S-VOL is displayed in AAA-BB-CCC(XX:YY:ZZ) format.
–
–
–
–
AAA: The port ID (cluster and channel number)
BB: The group number of host group
CCC: LU number
XX:YY:ZZ: LDKC number:CU number:LDEV number
An LDEV number that ends with a # indicates that the LDEV is an external volume (for
example, 00:00:01#). An LDEV number that ends with the letter X indicates that the LDEV
is a virtual volume used by XP Thin Provisioning (for example, 00:00:00X). For details
regarding external volumes, see the HP StorageWorks XP24000/XP20000 External
Storage Software User Guide. For information about XP Thin Provisioning, see the HP
StorageWorks XP24000/XP20000 Thin Provisioning Software User Guide.
◦
Emulation: emulation type
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◦
◦
◦
Capacity(MB): storage capacity of the XP Snapshot pair
CLPR(P): cache logical partition of the P-VOL
CLPR(S): cache logical partition of the S-VOL
•
•
OK button
Closes the Pairsplit-S dialog box and displays the list of XP Snapshot pairs in the Preview list.
Cancel button
Cancels the operation and closes the Pairsplit-S dialog box.
For details about the Pairsplit-S dialog box that will be displayed when you select XP Business
Copy pairs, see the HP StorageWorks XP24000/XP20000 Business Copy Software User Guide.
Deleting XP Snapshot Pairs by Selecting the Pairs per Pool
To delete XP Snapshot pairs by selecting the pairs per pool:
1. Start the Remote Web Console and display the Remote Web Console main window.
2. Change the mode of the Remote Web Console to Modify. If the mode is already changed to
Modify, you can skip this step. For information on how to change the mode, see the HP
StorageWorks XP24000/XP20000 Remote Web Console User Guide.
4. In the tree, select the pool that contains the XP Snapshot pairs you want to delete. The list of
the pairs or volumes is displayed in the volume list.
5. Select and right-click the XP Snapshot pairs you want to delete. A menu is displayed.
Dialog Box” (page 90)) is displayed.
7. Click OK. The Pairsplit-S dialog box closes and a list of the XP Snapshot pairs that you are
going to delete is displayed in the Preview list of the XP Snapshot window.
8. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
9. Click OK. The confirmation message closes and the deletion of the pair is applied to the
storage system.
Viewing Detailed Volume and Pair Information
To display the Detail dialog box:
1. Display the XP Business Copy's Pair Operation window.
2. Select and right-click an XP Snapshot pair on the volume list. A menu is displayed.
3. Select the Detailcommand from the menu. The Detail dialog box is displayed.
If you select the Detailcommand in the menu when you are selecting an XP Business Copy pair,
the displayed Detail dialog box will be different from that displayed when you select an XP Snapshot
pair. For details, see the HP StorageWorks XP24000/XP20000 Business Copy Software User
Guide.
Viewing Detailed Volume and Pair Information
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Figure 24 Detail Dialog Box for an XP Snapshot Pair
The Detail dialog box displays the following items.
•
•
•
•
•
•
•
•
•
P-VOL
LDKC number, CU number, and LDEV number of the P-VOL are displayed.
Emulation
Emulation type of the P-VOL is displayed.
Capacity(MB)
Capacity of the P-VOL is displayed. The unit is megabytes (MB).
Capacity(blocks)
The number of blocks used by the P-VOL is displayed.
CLPR(P)
The cache logical partition (CLPR) of the P-VOL is displayed.
Pool ID
The Pool ID of the pool in which the P-VOL is registered is displayed.
Amount of pool use by P-VOL(GB)
The Amount of the pool capacity that is used by the P-VOL is displayed.
Pool usage rate by P-VOL
The Pool usage rate of the P-VOL is displayed.
XP Snapshot Pair Detail list
The following information items of snapshot data are displayed.
◦
◦
◦
◦
◦
◦
MU: snapshot ID
S-VOL: LDKC number, CU number, and LDEV number of the S-VOL
Status: status of the XP Snapshot pair
Date: time when the snapshot data is stored in the pool
Pool used(GB): capacity of the pool that is used by the S-VOL
Sync.: consistency rate of the data of the P-VOL and the S-VOL
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◦
◦
CLPR(S): cache logical partition (CLPR) of the S-VOL
CTG: consistency group number of the XP Snapshot pair.
When the consistency group is not specified, dotted lines (- - -) will appear.
•
Refresh the window after this dialog box is closed check box
If you select the check box, the information displayed in XP Business Copy's Pair Operation
window will be updated after the Detail dialog box closes. If you do not select the check box,
the information in the Pair Operation window will be the same before and after you close the
Detail dialog box.
•
•
Refresh button
Updates the information in the Detail dialog box.
Close button
Closes the Detail dialog box.
Viewing S-VOL Path Information
To display the S-VOL Path dialog box:
1. Display the XP Business Copy's Pair Operation window.
2. Select and right-click an XP Snapshot pair on the volume list. A menu is displayed.
3. Select the S-VOL Pathcommand from the menu. The S-VOL Path dialog box is displayed.
Figure 25 S-VOL Path Dialog Box
The S-VOL Path dialog box displays the following items:
•
The Pair Information box displays only information for the paths which are used by the XP
Snapshot pairs selected in the Pair Operation window Volume List. P-VOL displays the path
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information for the P-VOLs and S-VOL displays the path information for the S-VOLs in
AAA-BB-CCC(XX:YY:ZZ) format.
◦
◦
◦
◦
AAA: The port ID (cluster name and channel number)
BB: The group number (G-ID) of the host group
CCC: LU number
XX: YY: ZZ: LDKC number: CU number: LDEV number
An LDEV number that ends with a # indicates that the LDEV is an external volume (for example,
00:00:01#). An LDEV number that ends with the letter X indicates that the LDEV is a virtual
volume used by XP Thin Provisioning (for example, 00:00:00X). For details regarding external
volumes, see the HP StorageWorks XP24000/XP20000 External Storage Software User's
Guide. For information about XP Thin Provisioning, see the HP StorageWorks
XP24000/XP20000 Thin Provisioning Software User Guide.
•
•
The S-VOL Path Information box displays all the path information, including the alternate paths
for the S-VOLs selected in the Pair Information box.
◦
◦
◦
Port: The port ID
GID: The group number of the host group
LUN: LU number
Close button
Closes the S-VOL Path dialog box.
Viewing the Number of Pairs and License Information
The Information dialog box displays information such as the number of pairs in the storage system,
the number of reserve volumes, and the license capacity.
To display the Information dialog box:
1. Right-click anywhere on the volume list in XP Business Copy's Pair Operation window. A menu
will be displayed.
2. Select the Informationcommand in the menu. The Information dialog box will be displayed.
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Figure 26 Information Dialog Box
The following information will be displayed in the Information dialog box:
•
XP Business Copy pair(s)
The number of XP Business Copy pairs will be displayed in the format XXXX / YYYY. XXXX
indicates the number of XP Business Copy pairs, and YYYY indicates the total number of XP
Business Copy pairs and XP Business Copy for Mainframe pairs.
•
XP Snapshot pair(s)
The number of XP Snapshot pairs will be displayed.
The maximum number of pairs that can be created in one storage system is 16,384, including
migration plans and relationships. Therefore, if XP Snapshot pairs, migration plans of Auto
LUN, and relationships of Compatible FlashCopy Version 1 and Compatible FlashCopy Version
2 are created in the same storage system, the maximum number of pairs that you can create
may be less than 16,384 minus YYYY. For information on using XP Auto LUN Software, contact
•
Reserved volume(s)
The number of reserved volumes of XP Business Copy will be displayed in the format XXXX /
YYYY. XXXX indicates the number of reserved volumes of XP Business Copy, and YYYY indicates
the total number of reserved volumes of XP Business Copy and XP Business Copy for Mainframe.
Reserved volumes include S-VOLs of XP Business Copy and XP Business Copy for Mainframe
pairs.
•
•
Remaining pair table
The remaining number of usable pair tables in the storage system will be displayed in the
format XXXXX / YYYYY. XXXXX indicates the remaining number of usable pair table. YYYYY
indicates the maximum number of pair tables. For details about the maximum number of pair
Remaining differential table
The remaining number of usable differential tables in the storage system will be displayed in
the format XXXXXX / YYYYYY. XXXXXX indicates the remaining number of usable differential
table. YYYYYY indicates the maximum number of differential tables. For details about the
maximum number of differential tables, see “Calculating the Maximum Number of Pairs”
•
Used volume (TB)
License information for XP Business Copy will be indicated in the format X(Y). X indicates
license capacity used by XP Business Copy, and Y indicates total license capacity reserved
Viewing the Number of Pairs and License Information 95
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for XP Business Copy. Unlimited will be displayed when there is no limit on the license capacity
for XP Business Copy.
•
•
XP Snapshot Used volume (TB)
License information for XP Snapshot will be indicated in the format of X(Y). X indicates license
capacity used by XP Snapshot, and Y indicates total license capacity reserved for XP Snapshot.
Unlimited will be displayed when there is no limit on the license capacity for XP Snapshot.
Close button
Closes the Information dialog box.
Displaying the Operation History
operations.
To see the history:
1. Display the History window.
•
•
If you are already displaying another window, click the History tab.
If some of the pairs include LUSE volumes, or if the total number of the following pairs
and migration plans is 500 or more in the storage system, you may need to wait for a
while until the History window displays operation history:
◦
◦
◦
◦
◦
◦
XP Business Copy pairs
XP Snapshot pairs
XP Business Copy for Mainframe pairs
Compatible FlashCopy Version 1 relationships
Compatible FlashCopy Version 2 relationships
Migration plans of Auto LUN
2. See the XP Snapshot list in the lower area of the History window.
3. To change the display order, click a column in the list. The list will be sorted based on the
items in the clicked column.
•
•
If there are more than 16,384 records of operations, the list will be divided into multiple
pages and only the list which is currently displayed will be sorted.
If you click the same column again, you can switch the sorting order (Ascending or
Descending).
4. If the information in the list is not updated, click File and then Refresh on the menu bar of the
Remote Web Console main window. The list will be updated to the latest information.
As for operations involving the copying process, the History window does not display
information about the operations until the copying process starts. If you perform an operation
on a pair before the copying process starts, the History window will not display information
about the operation.
5. If there are many records of operations, click the scroll button. The list will scroll and you will
be able to see the operation history that has not been displayed.
If you click and drag down the frame border which divides the History window into upper
and lower panes, you can expand the display area of the list.
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6. If there are more than 16,384 records of operations, click Next. The list displays subsequent
records of operations.
•
•
•
If you click Previous, the list switches to the previous page.
If there are 16,384 or fewer records of operations, you cannot click Previous and Next.
The storage system saves up to 524,288 records of the latest operations.
Displaying the Operation History
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6 Troubleshooting
This chapter provides troubleshooting information for XP Snapshot.
•
•
•
If you have a problem with the Remote Web Console, see the HP StorageWorks XP24000/XP20000
Remote Web Console User Guide for troubleshooting information.
Table 32 (page 99) shows problems that might occur when you are using XP Snapshot. The table
also describes the causes of the problems and what you should do to solve the problems. If a
problem cannot be resolved as described in the table, or if a problem that is not listed occurs, call
HP technical support.
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Table 32 Troubleshooting for XP Snapshot
Problem
Causes and Solutions
Cannot install XP
Snapshot.
Causes:
• Shared memory for the V-VOL management area is not installed.
• Shared memory is not set for the V-VOL management area.
• Shared memory for the differential tables is not installed.
Solutions:
• Call HP technical support and check if the shared memory for the V-VOL
management area and the differential tables is installed.
• Call HP technical support and check if the shared memory for the V-VOL
management area is set correctly.
Pool information is not
displayed.
Causes:
• The pool is blocked.
Solutions:
A pool is blocked.
Causes:
• The pool-VOLs are blocked.
Solutions:
(page 101). In addition, after the problems are solved, you need to complete
the SIMs. If you do not complete the SIMs, no new SIM can occur even if a
pool is blocked again. For details about the procedure to complete SIMs,
Pool usage rate exceeds
the threshold.
Causes:
• Too much snapshot data is stored in the pool.
• Capacity of the pool is insufficient.
• Threshold of the pool is too low.
Solutions:
• Delete the snapshot data that is less important or delete the old snapshot
data to decrease the usage rate of the pool.
• Add some pool volumes to increase the capacity of the pool.
• Set a larger value to the threshold of the pool.
In addition, after the problems are solved, you need to complete the SIMs. If
you do not complete the SIMs, no new SIM can occur even if the usage rate
exceeds the threshold again. For details about the procedure to complete SIMs,
NOTE: You need unused volumes to add the pool volumes. If there is no
unused volume, you need to create new volumes or ask HP technical support
to add the hard disks. Therefore, it may take time to solve the problem.
Cannot add pool-VOLs.
Causes:
• 1,024 pool-VOLs are already set in the pool.
• The available pool management block in the V-VOL management area
(which is in the shared memory) is insufficient.
• The requirements of the pool-VOLs are not fulfilled.
Solutions:
• Add pool-VOLs to another pool.
• Initialize the V-VOL management area.
• Add the pool-VOLs that fulfill the requirements.
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Table 32 Troubleshooting for XP Snapshot (continued)
Problem
Causes and Solutions
Cannot create XP
Snapshot pairs.
Causes:
• There are not enough differential tables to create the pairs.
• The conditions to create the pair are not fulfilled.
• The volumes specified to create the pair are in SMPL(PD) status because the
pair is being deleted.
Solutions:
• Secure enough differential tables to create the XP Snapshot pairs.
• Fulfill the conditions to create the pair and try the pair creation again.
• See XP Business Copy's Pair Operation window and verify that the status
of the volume changes to SMPL, and then try the pair creation again.
• Execute RAID Manager's inqraidcommand and verify that the volume is
not used by XP Snapshot, and then try the pair creation again.
XP Snapshot pairs are not Causes:
displayed in the volume
• XP Snapshot pairs are not created.
list.
• Displaying XP Snapshot pairs is prohibited by the filtering function.
Solutions:
• Create XP Snapshot pairs.
• Change the settings in the Display Filter dialog box.
An error occurred while
restoring the pair.
Causes:
• A volume is blocked because a failure occurred in the hard disk drive.
Solutions:
• Delete the XP Snapshot pair that is blocked, and call HP technical support.
A volume is blocked.
Causes:
• A failure occurred in two or more hard disk drives.
• The breaker was turned off once and then the power supply was switched
on.
Solutions:
• Ask HP technical support to solve the problem.
Trouble occurs on the
application software
installed in the host
computer in order to
monitor the volumes.
Causes:
• Access to the volume is rejected.
Solutions:
• Terminate the application software which monitors the volumes.
• Change all the XP Snapshot pair statuses to PSUS, then start the application
software to monitor the volumes.
For details about the relations between the pair status and host access, see
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Table 32 Troubleshooting for XP Snapshot (continued)
Problem
Causes and Solutions
When the host computer Causes:
tries to access the port, an
• Some ports go offline because the access to the volume on the other port(s)
is rejected.
Solutions:
error occurs and the host
cannot access the port.
• Wait for a while, then try the operation again.
• If the application software is installed in the host to monitor the volume,
terminate the application.
When you are operating Causes:
Remote Web Console,
• The load on the Remote Web Console computer is too heavy, so the Remote
time-out occurs frequently.
Web Console computer cannot respond to the SVP.
• The period of time until time-out occurs is set too short.
Solutions:
• Wait for a while, then try the operation again.
• Verify the environment parameter setting for the Remote Web console RMI
time-out period.
For information about how to set the RMI time-out period, see the HP
StorageWorks XP24000/XP20000 Remote Web Console User Guide.
Procedure to Recover a Blocked Pool
When a pool is blocked, you need to recover the following (in the order that they appear):
•
•
•
•
pool-VOLs
pool
XP Snapshot pairs
V-VOLs
This section describes the procedures to recover the blocked pool.
•
•
Recovery of the pool-VOLs. If the pool-VOL is blocked, call HP technical support.
Recovery of the pool. To recover the pool:
1. Display the Pool window.
2. Select and right-click the blocked pool in the Pool tree in the Pool window. A menu is displayed.
3. Select the Restore Poolcommand from the menu. A confirmation message is displayed
asking if it is OK to restore the selected pool.
4. Click OK. The icon of the selected pool changes to the icon which indicates the normal status.
5. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
6. Click OK. The confirmation message closes and the restoration of the pool is applied to the
storage system.
When there is more than one blocked pool, you may restore all the blocked pools at the same
time by executing the following operation after you display the Pool window.
1. Select and right-click the XP Snapshot icon in the Pool tree in the Pool window. A menu is
displayed.
2. Select the Restore Pool(s)command from the menu. A confirmation message is displayed
asking if it is OK to restore the pools.
3. Click OK. The icons of the blocked pools in the Pool tree change to the icons which indicate
the normal status.
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4. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
5. Click OK. The confirmation message closes and the restoration of the pools is applied to the
storage system.
6. You can check whether the pool is recovered from the blocked status in the Pool window. If
Status of the Pool Information displays Normal, or if the icon in the Pool tree indicates the
normal status, the blocked pool is restored successfully.
You can also recover the pool by doing one of the following operations:
•
•
•
Add some pool-VOLs.
Delete snapshot data to decrease the usage rate of the pool.
Delete XP Snapshot pairs to decrease the usage rate of the pool.
The usage rate and status of the pool are displayed in the Pool Information box in the Pool window.
Use this information to decide how many pool volumes to add or which snapshot data to delete.
•
Recovery of the XP Snapshot pair. When the pool is blocked, the status of all XP Snapshot
pairs that have snapshot data stored in the pool changes to PSUE. To recover the PSUE pairs,
delete those pairs.
•
Recovery of the V-VOL. When the V-VOL is blocked, call HP technical support.
Procedure to Complete the Pool-Related SIMs
When the usage rate of the pool exceeds the threshold, or when the pool becomes blocked, the
following SIMs (Service Information Messages) will occur.
•
•
When the usage rate of the pool exceeds the threshold: Reference code 601XXX
When the pool becomes blocked: Reference code 602XXX
XXX indicates the pool ID. For details about the SIM reference codes, call HP technical support.
You can reference the SIMs occurring in the storage system through the window of Remote Web
Console. For details about the window, see the HP StorageWorks XP24000/XP20000 Remote
Web Console User Guide.
If you complete a SIM, the status of the SIM changes to completed. After the problem that caused
the SIM is solved, complete the SIM and change its status to completed. To complete the SIMs that
occur when the usage rate of the pool exceeds the threshold or when the pool becomes blocked:
1. Change the status of the pool whose usage rate exceeds the threshold to normal, and restore
the blocked pool to change its status to normal. For information about the solutions when the
pool usage rate exceeds the threshold and the pool becomes blocked, see “Troubleshooting
2. Change the mode of the Remote Web Console to Modify. If the mode is already changed to
Modify, you can skip this step. For information about how to change the mode, see the HP
StorageWorks XP24000/XP20000 Remote Web Console User Guide.
3. Display the Pool window.
4. Select the SIM Complete Request check box.
5. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage
system is displayed.
6. Click OK. The confirmation message closes and the SIM completion process begins. It takes
time if there are many SIMs to be completed.
You can check whether the SIMs are completed successfully in the window of Remote Web Console.
For details, see the HP StorageWorks XP24000/XP20000 Remote Web Console User Guide.
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Troubleshooting When Using XP RAID Manager
When an error has occurred during an XP Snapshot Pair operation using RAID Manager, see the
log displayed on the RAID Manager window or the RAID Manager operation log file to see if you
can identify the cause of the error. The RAID Manager operation log file is stored in the following
directory by default.
The log file is stored in: /HORCM/log*/curlog/horcmlog_HOST/horcm.log
Where:
•
•
* is the instance number.
HOST is the host name.
To identify the error code using the log file, follow the procedure below. For more information
about RAID Manager, see the HP StorageWorks XP RAID Manager User Guide.
1. Open the RAID Manager log file, and find the error code.
Example: 11:06:03-37897-10413- SSB = 0xB901,4A96
Error codes appear on the right of the equal symbol (=). The alphanumeric characters of last
four digits on the left of the comma (,) indicates SSB1 (for example, B901), and the right of
the comma (,) indicates SSB2 (for example, 4A96).
To identify the error code using the log displayed on the RAID Manager window, follow the
procedure below. For more information about RAID Manger, see the HP StorageWorks XP RAID
Manager User Guide.
1. Find the error code from the logs displayed on the RAID Manager window.
Figure 27 (page 103) shows an example of a log displayed on the RAID Manager window.
Figure 27 Example of a Log Displayed on the RAID Manager Window
Error codes appear on the right of SSB=. The alphanumeric characters of last four digits on
the left of the comma (,) indicates SSB1 (for example, B9E1), and the alphanumeric characters
of last four digits on the right of the comma (,) indicates SSB2 (for example, B901).
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB)
SSB1
SSB2
RAID Manager Command
Cause of Error
B901
B9A8
B9A9
B9AD
B9AE
9685
paircreate
Because of the shortage of
the pair tables, XP Snapshot
pair cannot be created.
9686
paircreate
Because of the shortage of
the differential tables, XP
Snapshot pair cannot be
created.
9700
9702
paircreate
paircreate
Since the pool is not
available, XP Snapshot pair
cannot be created.
When you create multiple XP
Snapshot pairs by specifying
multiple S-VOLs for one
P-VOL, you specified the
pool ID that is different from
the pool ID used by the pairs
that are already created.
Therefore, an XP Snapshot
pair cannot be created.
9703
9704
9705
9706
paircreate
paircreate
paircreate
paircreate
Since the volume you
specified as the P-VOL is
already used by another XP
Snapshot S-VOL, the pair
cannot be created.
Since the volume you
specified as the S-VOL is
already used by another XP
Snapshot P-VOL, the pair
cannot be created.
Since the volume you
specified as the S-VOL is
already used by another XP
Snapshot S-VOL, the pair
cannot be created.
Since the specified XP
Snapshot ID is already used
by another XPp Snapshot
pair, the pair cannot be
created.
9707
9718
paircreate
Since the capacity of the
pair exceeds the licensed
capacity, the pair cannot be
created.
All commands
The command ended
abnormally because the
command other than the
paircreate command was
issued for the volume in the
pair other than the XP
Snapshot pair.
This error also may be
reported when the command
is executed by specifying an
unsupported parameter.
9719
All commands
104 Troubleshooting
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
The command ended
abnormally because the pair
is in the status that the
corresponding command is
not accepted at present.
This error also may be
reported when the command
is executed with specifying
an unsupported parameter.
971a
971b
paircreate
paircreate
Since the capacity of shared
memory is insufficient, the
pair cannot be created.
Since the attribute of the
specified pool is other than
XP Snapshot, an XP
Snapshot pair cannot be
created.
971f
pairresync -
restore
Since the volume you
specified as the P-VOL has
an S-VOL Disable attribute,
an XP Snapshot pair cannot
be restored.
9720
9721
All commands
Any errors have occurred
because of the XP Snapshot
operation.
paircreate
pairsplit
Since either XP Snapshot or
XP Business Copy Software
is not installed, the
pairresync
pairresync -
restore
command ends abnormally.
9723
9724
9725
All commands
All commands
All commands
Because of no additional
shared memory (FCV2, TPF,
Extention1), the command
ends abnormally.
Because of no additional
shared memory (more than
XP1), the command ends
abnormally.
Since the LDEV number of
the volume you specified as
the P-VOL is beyond the
specified range, the
command ends abnormally.
9726
9727
All commands
Since you specified the
unmounted volume as the XP
Snapshot P-VOL, the
command ends abnormally.
Since you specified the
blocked volume as the XP
Snapshot P-VOL, the
command ends abnormally.
Troubleshooting When Using XP RAID Manager 105
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
paircreate,
pairsplit,
pairresync,
pairresync -
pairresync -
9728
9729
paircreate,
pairsplit,
Since you specified the
volume that is in process of
formatting as the XP
pairresync,
pairresync -
pairresync -
Snapshot P-VOL, the
command ends abnormally.
paircreate,
pairsplit,
Since you specified the
volume whose emulation
type is other than OPEN-V
as the XP Snapshot P-VOL,
the command ends
pairresync,
pairresync -
pairresync -
abnormally.
972a
972c
972e
paircreate
paircreate
paircreate
Since the volume you
specified as the XP Snapshot
P-VOL has the command
device setting, the pair
cannot be created.
Since the capacity of the
volume you specified as the
XP Snapshot P-VOL exceeds
the supported size (4TB), the
pair cannot be created.
Since the capacity of the
volume you specified as the
XP Snapshot S-VOL exceeds
the supported size (4TB), the
pair cannot be created.
972f
paircreate
paircreate
Since you specified a V-VOL
as the XP Snapshot P-VOL,
the pair cannot be created.
9730
Since you specified a
pool-VOL as the XP Snapshot
P-VOL, the pair cannot be
created.
9731
9732
pairresync -
restore
When XP Snapshot P-VOL
and XP Continuous Access
Software P-VOL share the
volume, the status of the XP
Continuous Access pair is
other than PSUS or PSUE.
Therefore, the XP Snapshot
pair cannot be restored.
pairresync -
restore
106 Troubleshooting
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
When XP Snapshot P-VOL
and XP Continuous Access
Journal Software P-VOL
share the volume, the status
of the XP Continuous Access
Journal pair is other than
PSUS or PSUE. Therefore,
the XP Snapshot pair cannot
be restored.
9733
9734
9735
9736
pairresync -
restore
Since XP Snapshot P-VOL
and XP Continuous Access
S-VOL share the volume, the
XP Snapshot pair cannot be
restored.
pairresync -
restore
Since XP Snapshot P-VOL
and XP Continuous Access
Journal S-VOL share the
volume, the XP Snapshot
pair cannot be restored.
paircreate
Since you specified XP
Continuous Access Journal'S
journal volume as the XP
Snapshot P-VOL, the pair
cannot be created.
paircreate
pairsplit,
Since the LUSE volumes you
specified for the P-VOL and
S-VOL do not have the same
structure, the command ends
abnormally.
pairresync,
pairresync -
restore
973a
973b
paircreate
Since you specified the
volume with the VMA setting
as the XP Snapshot P-VOL,
the pair cannot be created.
All commands
Since the LDEV number of
the volume you specified as
the S-VOL is beyond the
specified range, the
command ends abnormally.
973c
973d
All commands
Since you specified the
unmounted volume as the XP
Snapshot S-VOL, the
command ends abnormally.
paircreate
pairsplit,
Since you specified the
blocked volume as the XP
Snapshot S-VOL, the
pairresync,
pairresync -
restore
command ends abnormally.
973e
Since you specified the
volume that is in process of
formatting as the XP
Snapshot S-VOL, the
command ends abnormally.
Troubleshooting When Using XP RAID Manager 107
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
paircreate
pairsplit,
pairresync,
pairresync -
restore
973f
paircreate
pairsplit,
Since you specified the
volume whose emulation
type is other than OPEN-V
as the XP Snapshot S-VOL,
the command ends
pairresync,
pairresync -
restore
abnormally.
9740
paircreate
Since the volume you
specified as the XP Snapshot
S-VOL has the command
device setting, the pair
cannot be created.
9742
9745
9746
9747
9748
9749
paircreate
paircreate
paircreate
paircreate
paircreate
paircreate
Since you specified an
external volume as the XP
Snapshot S-VOL, the pair
cannot be created.
Since you specified the
volume other than V-VOLs as
the XP Snapshot S-VOL, the
pair cannot be created.
Since you specified a
pool-VOL as the XP Snapshot
S-VOL, the pair cannot be
created.
Since you specified XP
Continuous Access P-VOL as
the XP Snapshot S-VOL, the
pair cannot be created.
Since you specified XP
Continuous Access S-VOL as
the XP Snapshot S-VOL, the
pair cannot be created.
Since you specified XP
Continuous Access Journal
data volume or journal
volume in the intermediate
site of 3DC cascading
configuration as the XP
Snapshot S-VOL, the
Snapshot pair cannot be
created.
974a
974b
paircreate
paircreate
Since you specified XP
Continuous Access Journal
P-VOL as the XP Snapshot
S-VOL, the pair cannot be
created.
108 Troubleshooting
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
Since you specified XP
Continuous Access Journal
S-VOL as the XP Snapshot
S-VOL, the pair cannot be
created.
974c
974f
paircreate
Since you specified XP
Continuous Access Journal
journal volume as the XP
Snapshot S-VOL, the pair
cannot be created.
All commands
paircreate
Since the volume you
specified as the S-VOL has
an S-VOL Disable attribute,
the command ends
abnormally.
9750
9752
Since you specified the
volume with the VMA setting
as the XP Snapshot S-VOL,
the pair cannot be created.
paircreate,
pairsplit,
Since the Max LBA size of
the volumes you specified as
the XP Snapshot P-VOL and
S-VOL is different, the
pairresync,
pairresync -
restore
command ends abnormally.
9753
paircreate,
pairsplit,
Since the number of slots of
the volumes you specified as
the XP Snapshot P-VOL and
S-VOL is different, the
pairresync,
pairresync -
restore
command ends abnormally.
9754
9756
paircreate,
Since you specified the XP
Thin Provisioning V-VOL as
the XP Snapshot S-VOL, the
pair cannot be created.
All commands
Since you specified the XP
Business Copy reserved
volume as the XP Snapshot
P-VOL, the command ends
abnormally.
9757
All commands
Since you specified the XP
Auto LUN Software source
volume as the XP Snapshot
P-VOL, the command ends
abnormally.
For information about using
XP Auto LUN, contact HP
technical support (see
9758
All commands
Troubleshooting When Using XP RAID Manager 109
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
Since you specified the XP
Auto LUN target volume as
the XP Snapshot P-VOL, the
command ends abnormally.
For information about using
XP Auto LUN, contact HP
technical support (see
9759
All commands
Since you specified the XP
Auto LUN reserved volume
as the XP Snapshot P-VOL,
the command ends
abnormally.
For information about using
XP Auto LUN, contact HP
technical support (see
975a
975b
975c
All commands
All commands
All commands
Since you specified the XP
Business Copy P-VOL as the
XP Snapshot S-VOL, the
command ends abnormally.
Since you specified the XP
Business Copy S-VOL as the
XP Snapshot S-VOL, the
command ends abnormally.
Since you specified the XP
Business Copy reserved
volume as the XP Snapshot
S-VOL, the command ends
abnormally.
975d
All commands
Since you specified the XP
Auto LUN source volume as
the XP Snapshot S-VOL, the
command ends abnormally.
For information about using
XP Auto LUN, contact HP
technical support (see
975e
975f
All commands
All commands
Since you specified the XP
Auto LUN target volume as
the XP Snapshot S-VOL, the
command ends abnormally.
For information about using
XP Auto LUN, contact HP
technical support (see
Since you specified the XP
Auto LUN reserved volume
as the XP Snapshot S-VOL,
the command ends
abnormally.
For information about using
XP Auto LUN, contact HP
technical support (see
9763
paircreate
110 Troubleshooting
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
The XP Snapshot pair cannot
be created for any of the
following reasons:
• The shared memory is not
increased.
• Initialization is in
process.
976a
976c
paircreate
pairsplit
Unavailable parameter
(unsupported parameter) is
specified in the command.
Since the command was
executed with the PSUE
option, the snapshot data
cannot be stored.
976e
976f
pairsplit
pairsplit
When an XP Snapshot P-VOL
and XP Continuous Access
S-VOL share the volume, the
status of the XP Continuous
Access pair is COPY.
Therefore, the snapshot data
cannot be stored.
When XP Snapshot P-VOL
and XP Continuous Access
Journal S-VOL share the
volume, the status of the XP
Continuous Access Journal
pair is COPY. Therefore, the
snapshot data cannot be
stored.
9771
9772
9774
paircreate
paircreate
paircreate
Since you specified XP
Continuous Access Journal
delta resync pair volume as
the XP Snapshot P-VOL, the
XP Snapshot pair cannot be
created.
Since you specified XP
Continuous Access Journal
delta resync pair volume as
the XP Snapshot S-VOL, the
XP Snapshot pair cannot be
created.
When the XP Snapshot
P-VOL and XP Business Copy
P-VOL share the volume, the
MU number you specified
for the XP Snapshot pair is
already used by the XP
Business Copy pair.
Therefore, the XP Snapshot
pair cannot be created.
9776
paircreate
Troubleshooting When Using XP RAID Manager 111
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
When the XP Snapshot
P-VOL and XP Business Copy
P-VOL share the volume, the
XP Business Copy P-VOL you
specified for the XP Snapshot
P-VOL has consistency group
settings. Therefore, the XP
Snapshot pair cannot be
created.
9777
9778
paircreate
paircreate
When the XP Snapshot
P-VOL and XP Business Copy
S-VOL share the volume, you
specified MU number zero
(0) for the XP Snapshot
P-VOL. Therefore, the XP
Snapshot pair cannot be
created.
When the XP Snapshot
P-VOL and S-VOL share the
volume, the XP Business
Copy S-VOL you specified
for theXP Snapshot P-VOL
has consistency group
settings. Therefore, the XP
Snapshot pair cannot be
created.
977a
paircreate,
pairsplit
When the XP Snapshot
P-VOL and XP Business Copy
P-VOL share the volume, the
XP Business Copy pair was
in the process of
resynchronization.
Therefore, the command
ends abnormally.
977b
977c
977d
977e
paircreate,
pairsplit
When XP Snapshot P-VOL
and XP Business Copy S-VOL
share the volume, the status
of the XP Business Copy pair
is other than PSUS.
Therefore, the command
ends abnormally.
pairresync -
restore
When XP Snapshot P-VOL
and XP Business Copy P-VOL
share the volume, the status
of the XP Business Copy pair
is other than PSUS or PSUE.
Therefore, the XP Snapshot
pair cannot be restored.
pairresync -
restore
When XP Snapshot P-VOL
and XP Business Copy S-VOL
share the volume, the status
of the XP Business Copy pair
is other than PSUS.
Therefore, the XP Snapshot
pair cannot be restored.
pairsplit
112 Troubleshooting
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
Since the pool or the
pool-VOL is blocked, the
snapshot data cannot be
stored.
9783
pairresync,
restore
The XP Snapshot pair cannot
be restored for any of the
following reasons:
• The snapshot data of the
XP Snapshot pair for
restoration is being
stored per consistency
group.
• The P-VOL of the XP
Snapshot pair for
restoration is used as the
P-VOL of another XP
Snapshot pair, and the
snapshot data of the
latter XP Snapshot pair is
being stored per
consistency group.
9786
9787
978a
paircreate,
pairsplit,
Since quorum disks are
specified as P-VOLs of
Snapshot pairs, the
pairresync,
pairresync -
restore
command ends abnormally.
paircreate,
pairsplit,
Since quorum disks are
specified as S-VOLs of
Snapshot pairs, the
pairresync,
pairresync -
restore
command ends abnormally.
paircreate
Since one of the following
cases occurred, the XP
Snapshot pair cannot be
created by specifying the
consistency number.
• The specified consistency
group number is in use
for XP Business Copy.
• The number of pairs has
already exceeded the
maximum number of
pairs that can be created
for one consistency
group.
• The pair that uses the
same P-VOL exists
already in the specified
consistency group.
978b
paircreate
Troubleshooting When Using XP RAID Manager 113
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
The XP Snapshot pair cannot
be created because the
specified consistency group
number is out of the range
of the number that can be
specified.
978c
pairsplit
The snapshot data cannot be
stored because the XP
Continuous Access
asynchronous pair status is
other than PSUS or PSUE
when XP Snapshot (P-VOL)
and XP Continuous Access
asynchronous (S-VOL) share
the volume.
978e
9790
paircreate
The XP Snapshot pair for
which the consistency group
is specified cannot be
created because the P-VOL
or S-VOL of the XP Business
Copy pair is specified as the
P-VOL of the XP Snapshot
pair.
paircreate
paircreate
The XP Thin Provisioning
virtual volume, which is
undergoing capacity
expansion, is specified as
the XP Snapshot P-VOL.
Therefore, the XP Snapshot
pair cannot be created.
9793
97a2
The XP Snapshot pair cannot
be created because the XP
Thin Provisioning V-VOL that
is discarding zero data is
specified as a P-VOL of the
XP Snapshot pair.
paircreate
The command ended
abnormally because the
specified S-VOL used two
mirrors in a 3DC multi-target
or 3DC cascade
configuration, which is a
delta resync configuration
consisting of three XP
Continuous Access Journal
sites.
pairsplit
pairresync
pairresync -restore
97a3
paircreate
The command ended
abnormally because the
specified S-VOL used two
mirrors in a 3DC multi-target
or 3DC cascade
configuration, which is a
delta resync configuration
consisting of three XP
Continuous Access Journal
sites.
pairsplit
pairresync
pairresync -restore
B912
114 Troubleshooting
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Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued)
SSB1
SSB2
RAID Manager Command
Cause of Error
paircreate
pairsplit
The XP Snapshot pair
operation failed because the
specified S-VOL is wrong.
pairresync
B9A7
All commands
The consistency group
information cannot be
obtained because the XP
Snapshot is not installed.
Troubleshooting When Using XP RAID Manager 115
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7 Support and other resources
Contacting HP
HP technical support
For worldwide technical support information, see the HP support website:
Before contacting HP, collect the following information:
•
•
•
•
•
•
Product model names and numbers
Technical support registration number (if applicable)
Product serial numbers
Error messages
Operating system type and revision level
Detailed questions
Subscription service
HP recommends that you register your product at the Subscriber’s Choice for Business website:
After registering, you will receive email notification of product enhancements, new driver versions,
firmware updates, and other product resources.
Documentation Feedback
HP welcomes your feedback.
To make comments and suggestions about product documentation, send a message to
Related information
The following documents and website provide related information:
•
•
•
•
•
•
•
•
HP StorageWorks XP24000/XP20000 Disk Array Owner Guide
HP StorageWorks XP24000/XP20000 Remote Web Console User Guide
HP StorageWorks XP24000/XP20000 Remote Web Console User Guide
HP StorageWorks XP24000/XP20000 Business Copy Software User Guide
HP StorageWorks XP24000/XP20000 Continuous Access Software User Guide
HP StorageWorks XP24000/XP20000 Continuous Access Journal Software User Guide
HP StorageWorks XP24000/XP20000 LUN Expansion User Guide
HP StorageWorks XP24000/XP20000 Virtual LVI/LUN (VLL) and Volume Shredder User
Guide
•
•
•
HP StorageWorks XP24000/XP20000 Data Retention Utility User Guide
HP StorageWorks XP24000/XP20000 Performance Monitor User Guide
HP StorageWorks XP24000/XP20000 Auto LUN Software User Guide
116 Support and other resources
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•
•
HP StorageWorks XP24000/XP20000 Performance Control User Guide
HP StorageWorks XP RAID Manager User Guide
You can find these documents on the HP Manuals website:
In the Storage section, click Storage Software and then select a product.
Websites
For additional information, see the following HP websites:
•
•
•
•
Conventions for storage capacity values
HP XP storage systems use the following values to calculate physical storage capacity values (hard
disk drives):
•
•
•
•
•
1 KB (kilobyte) = 1,000 bytes
1 MB (megabyte) = 1,0002 bytes
1 GB (gigabyte) = 1,0003 bytes
1 TB (terabyte) = 1,0004 bytes
1 PB (petabyte) = 1,0005 bytes
HP XP storage systems use the following values to calculate logical storage capacity values (logical
devices):
•
•
•
•
•
•
1 KB (kilobyte) = 1,024 bytes
1 MB (megabyte) = 1,0242 bytes
1 GB (gigabyte) = 1,0243 bytes
1 TB (terabyte) = 1,0244 bytes
1 PB (petabyte) = 1,0245 bytes
1 block = 512 bytes
Typographic conventions
Table 34 Document conventions
Convention
Element
Medium blue text: Table 34 (page 117)
Cross-reference links and email addresses
Website addresses
Medium blue, underlined text: http://
Bold text
• Keys that are pressed
• Text typed into a GUI element, such as into a box
• GUI elements that are clicked or selected, such as menu and list items,
buttons, and check boxes
Italic text
Text emphasis
Conventions for storage capacity values 117
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Table 34 Document conventions (continued)
Convention
Element
Monospacetext
• File and directory names
• System output
• Code
• Commands, their arguments, and argument values
Monospace, italictext
Monospace, boldtext
• Code variables
• Command variables
Emphasized monospace text
.
.
Indication that the example continues.
.
An alert that calls attention to important information that if not understood
or followed can result in personal injury.
WARNING!
CAUTION:
An alert that calls attention to important information that if not understood
or followed can result in data loss, data corruption, or damage to
hardware or software.
An alert that calls attention to essential information.
IMPORTANT:
NOTE:
An alert that calls attention to additional or supplementary information.
An alert that calls attention to helpful hints and shortcuts.
TIP:
118 Support and other resources
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Glossary
3
3DC
Three data center.
C
CCI
Command control interface. An HP RAID manager.
Cache logical partition.
CLPR
CLPR(P)
CLPR(S)
CTG
Cache logical partition of the P-VOL.
Cache logical partition of the S-VOL.
Consistency group.
CU
Control unit.
CV
Custom sized volume.
CYL
Cylinder.
D
DKC
Disk controller.
DKCMAIN
Disk controller main.
F
FC
Fibre Channel. A network technology primarily used for storage networks.
Host group ID.
G
G-ID
L
LD, LDEV
Logical device. An LDEV is created when a RAID group is carved into pieces according to the
selected host emulation mode (that is, OPEN-3, OPEN-8, OPEN-9). The number of resulting LDEVs
depends on the selected emulation mode. The term LDEV is also known as term volume.
LDKC
LUN
Logical disk controller.
Logical unit number.
LUSE
Logical Unit Size Expansion. The LUSE feature is available when the HP StorageWorks LUN
Manager product is installed, and allows a LUN, normally associated with only a single LDEV,
to be associated with 1 to 36 LDEVs. Essentially, LUSE makes it possible for applications to access
a single large pool of storage.
LVI
Logical volume or image (for example, 3390-3R).
M
Mng.
MU
Management
Mirror unit.
O
OPEN-x
A general term describing any one of the supported OPEN emulation modes (for example,
OPEN-E. There are two types of OPEN-x devices: legacy OPEN-x devices with a fixed size (such
as, OPEN-3, OPEN-8, OPEN-9, OPEN-E), and OPEN-V, which has a variable size and is a CVS
based volume.
119
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P
P-VOL
PDEV
PFUL
PFUS
PSUE
PSUS
Primary volume.
Physical device.
PAIR closing full status.
PSUS closing full status.
Pair suspended-error.
Pair suspended-split.
R
RMI
Remote method invocation.
S
S-VOL
SATA
SIM
Secondary or remote volume. The copy volume that receives the data from the primary volume.
Serial Advanced Technology Attachment.
Service information message.
Storage logical partition.
Simplex.
SLPR
SMPL
SSB
Sense byte.
SSD
Solid state disk.
SVP
Service processor. A computer built into a disk array. The SVP, used only by an HP service
representative, provides a direct interface to the disk array.
V
V-VOL
VDEV
VLL
Virtual volume.
Virtual device.
Virtual LVI/LUN.
VMA
Volume management area.
120 Glossary
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Index
number of differential tables
A
access attribute, 27
Auto LUN, 27
calculating the number of XP Snapshot pairs, 36
O
C
optional requirements, 35
calculating the maximum number of pairs, 36
Change Pool Information dialog box, 72
command device, 35
P
Pair Operation window, 45
pair table
components, 8
conventions
calculating the number of XP Snapshot pairs, 39
Pairsplit-S dialog box, 90
performance considerations, 40
Pool window, 56
Preparing for XP Snapshot Operations, 33
Preview list, 50
Copy Threshold option, 25
Create V-VOL wizard dialog box (2), 79
Create V-VOL wizard dialog box (4), 82
D
R
Data Retention Utility, 27
defining pool capacity, 40
Detail dialog box, 92
Display Filter dialog box, 68
document
RAID level, 33
Remote Web Console main window, 43
requirements for RAID Manager, 35
documentation
S
S-VOL Path dialog box, 93
shared memory, 35
shared memory requirements, 35
E
External Storage, 47
external volumes, 47
starting , 42
storage capacity values
storage systems
supported models, 6
system requirements, 33
H
help
HP
I
T
Information dialog box, 95
installing, 42
installing and uninstalling, 42
troubleshooting, 98
L
U
license requirements, 35
uninstalling, 42
M
menu
V
Pair Operation window (volume list), 49
V-VOL window, 63
N
virtual volume management area
calculating the number of XP Snapshot pairs, 37
121
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volume list, 46
volume requirements, 33
W
websites
X
XP Business Copy, 27
XP Continuous Access, 30
XP Continuous Access Journal, 30
XP Snapshot Software license requirements, 35
XP Snapshot window, 53
XP Thin Provisioning, 32
122 Index
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